Wimbledon 2017: Best of the early rounds

Novak Djokovic is given treatment before retiring his quarterfinal match against Tomas Berdych on day nine.

Novak Djokovic serves to Tomas Berdych in their quarterfinal match on day nine.

Marin Cilic reacts during his quarterfinal match against Gilles Muller on day nine.

Roger Federer returns to Milos Raonic during their quarterfinal match on day nine.

Sam Querrey celebrates defeating Andy Murray in their quarterfinal match.

Sam Querrey in action against Andy Murray during their quarterfinal match.

Andy Murray reacts during his quarterfinal match against Sam Querrey.

Venus Williams celebrates match point during her match against Jelena Ostapenko Wimbledon.

Serbia's Novak Djokovic celebrates winning a point against Adrian Mannarino of France.

Venus Williams of the United States serves to Latvia's Jelena Ostapenko during their quarterfinal match on Day 8 at Wimbledon.

Slovakia's Magdalena Rybarikova serves to Coco Vandeweghe of the United States.

People watch a replay of a previous match as they sit under umbrellas on 'Murray Mound' on Day 8 at Wimbledon.

Spain's Garbine Muguruza celebrates winning the first set against Russia's Svetlana Kuznetsova.

Gilles Muller passes the scoreboard after a wild five-set win vs. Rafael Nadal.

Rafael Nadal celebrates during his Round of 16 match against Gilles Muller.

Roger Federer poses for a selfie as he leaves the court after winning his Round of 16 match vs. Grigor Dimitrov.

Dominic Thiem during his Round of 16 match vs. Tomas Berdych.

Venus Williams in action during her match against Ana Konjuh on Day 7 at Wimbledon.

Andy Murray celebrates his win over Benoit Paire in the Round of 16.

Rafael Nadal returns against Gilles Muller during their Round of 16 match.

Benoit Paire takes a fall as he plays Andy Murray in the Round of 16.

Andy Murray returns to Benoit Paire in their Round of 16 match.

Johanna Konta and Caroline Garcia meet at the net on day seven.

Garbine Muguruza celebrates after beating top-seeded Angelique Kerber in the Round of 16.

Venus Williams hits a return shot during her Round of 16 win.

Rafael Nadal is swarmed by fans after a training session on day seven at Wimbledon.

Jelena Ostapenko reacts during the Round of 16 win vs. Elina Svitolina.

Anett Kontaveit and Caroline Wozniacki at the net after their match on day six

Angelique Kerber reacts during her match against Shelby Rogers.

Shelby Rogers in action during her match against Angelique Kerber.

Rafael Nadal celebrates match point against Karen Khachaanov.

Victoria Azarenka reacts during her match against Heather Watson.

Steve Johnson of the United States celebrates winning a point against Croatia's Marin Cilic.

Britain's Heather Watson returns to Victoria Azarenka of Belarus.

Steve Johnson serves to Marin Cilic.

Dominika Cibulkova of Slovakia in action against Ana Konjuh of Croatia.

Fans of Spain's Rafael Nadal wait for him to arrive on court to play against Russia's Karen Khachanov.

Ana Konjuh of Croatia in action against Dominika Cibulkova of Slovakia.

Strawberries for sale on display, on Day 5 at Wimbledon.

Bethanie Mattek-Sands is tended to while on a gurney after being injured during her match against Sorana Cirstea.

Bethanie Mattek-Sands is carried on a stretcher to an ambulance after suffering an injury during her match against Sorana Cirstea.

Bethanie Mattek-Sands of the United States receives treatment from the medical team and later retires from her second-round match against Sorana Cirstea of Romania.

John Isner reacts during his match against Dudi Sela on Day 4 at Wimbledon.

Agnieszka Radwanska in action during her match against Christina McHale.

Rafael Nadal (ESP) celebrates match point during his match against Donald Young (USA) on day three at the All England Lawn Tennis and Croquet Club.

London, United Kingdom; Venus Williams (USA) celebrates match point during her match against Qiang Wang (CHN) on day three at the All England Lawn Tennis and Croquet Club.

Kei Nishikori (JAP) celebrates match point during his match against Sergiy Stakhovsky (UKR) on day three at the All England Lawn Tennis and Croquet Club.

Sam Querrey (USA) in action during his match against Nikoloz Basilashvili (GEO) on day three at the All England Lawn Tennis and Croquet Club.

Victoria Azarenka (BLR) celebrates match point during her match against Elena Vesnina (RUS) on day three at the All England Lawn Tennis and Croquet Club.

Victoria Azarenka (BLR) in action during her match against Elena Vesnina (RUS) on day three at the All England Lawn Tennis and Croquet Club.

Britain's Johanna Konta reacts as she returns against Croatia's Donna Vekic.

Maria Sakkari returns against Kristyna Pliskova during their second round match.

Dominika Cibulkova in action against Jennifer Brady during the second round.

Britain's Heather Watson reacts after winning against Latvia's Anastasija Sevastova.

Croatia's Donna Vekic serves against Britain's Johanna Konta in the second round.

Ukraine's Sergiy Stakhovsky returns against Japan's Kei Nishikori during their second round match.

Slovakia's Dominika Cibulkova and Jennifer Brady of the United States change ends.

A general view of court 10 during a first-round doubles match.

Alison Riske in action during her match against Sloane Stephens.

Sloane Stephens in action during her match against Alison Riske.

Novak Djokovic in action during his match against Martin Klizan.

Jack Sock in action during his match against Christian Garin.

Coco Vandeweghe reacts to a play during her first-round match.

Germany's Daniel Brands returns through his legs against France's Gael Monfils during their men's singles first round match on the second day of the 2017 Wimbledon Championships at The All England Lawn Tennis Club in Wimbledon, southwest London, on July 4, 2017. / AFP PHOTO / Adrian DENNIS / RESTRICTED TO EDITORIAL USEADRIAN DENNIS/AFP/Getty Images ORIG FILE ID: AFP_Q97YJ

Germany's Mischa Zverev plays a return against Australia's Bernard Tomic during the first round.

The shadow of Heather Watson follows her as she plays a shot during the first round.

Spectators use their tablets to take pictures during first-round action.

Daria Gavrilova of Australia stretches for a shot during the first round.

A fan sits in the raised seating on Court One at Wimbledon.

Britain's Kyle Edmund serves against Britain's Alexander Ward during the first round.

Australia's Thanasi Kokkinakis plays a shot against Argentina's Juan Martin del Potro during the first round.

Milos Raonic makes a face while playing a shot to Jan-Lennard Struff during the first round.

Poland's during the Wimbledon Tennis Championships in London on July 4.

Spain's David Ferrer returns to Richard Gasquet of France during the Wimbledon Tennis Championships on July 4.

Venus Williams in action during her match against Elise Mertens on Day 1 at Wimbledon

Stan Wawrinka of Suitzerland reacts during the Gentlemen's Singles first round match against Daniil Medvedev of Russia on day one of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club on July 3, 2017 in London, England.

Overview of No. 1 court during the John Millman and Rafael Nadal match.

Rafael Nadal in action during his match against John Millman.

Spectators shelter from the rain on the opening day at the Wimbledon Tennis Championships July 3.

Madison Keys in action during her match against Nao Hibino.

Belgium's Elise Mertens returns against U.S. player Venus Williams during their women's singles first round match on the first day of the 2017 Wimbledon Championships at The All England Lawn Tennis Club on July 3.

Nick Kyrgios of Australia gets in trouble against Pierre-Hugues Herbert of France in their first round match during the Wimbledon Championships at the All England Lawn Tennis Club on July 3.

Venus Williams in action during a women's singles first round match against Elise Mertens during the 2017 Wimbledon Championships on July 3.

An injured Nick Kyrgios of Australia reacts as he retires during his first round match against Pierre-Hugues Herbert of France during the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club on July 3.

Catherine, Duchess of Cambridge is greeted by HRH The Duke of Kent on centre court during the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club on July 3.

Alize Cornet of France reacts during her first round match against Camila Giorgi of Italy during the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club on July 3.

ndy Murray of Great Britain acknowledges the crowd ahead of his the first round match against Alexander Bubik of Kazakhstan during the Wimbledon Lawn Tennis Championships on July 3,

Britain's Catherine, Duchess of Cambridge, smiles as she meets former players, servicemen and servicewomen as she visits The All England Lawn Tennis Club on July 3.

Germany's Dustin Brown returns against Portugal's Joao Sousa during their men's singles first round match during the 2017 Wimbledon Championships on July 3.

Supporters of Japan's Nao Hibino watch as she plays Madison Keys of the United States on the opening day at the Wimbledon Tennis Championships in London July 3.

Canada's Denis Shapovalov returns to Poland's Jerzy Janowicz during their men's singles match during the Wimbledon Tennis Championships in London on July 3.