With new coaches in his corner, Novak Djokovic moves through at Wimbledon

Short as it was, Roger Federer’s shift lasted longer than that of Novak Djokovic.
The three-time champion was through in 40 minutes when his opponent, Martin Klizan, retired on account of a calf injury. Given his erratic results, and two new coaches (Andre Agassi and Mario Ancic) Djokovic likely wanted a longer workout.
An early exit for Martin Klizan, who is forced to retire due to injury against Novak Djokovic...#Wimbledon pic.twitter.com/BbDjIQEOsY
— Wimbledon (@Wimbledon) July 4, 2017
Recall the 2016 U.S. Open: Djokovic reached the finals but won only three complete matches, which impacted his rhythms. Still for as often as the Big Four come in for praise, here’s still another element of their collective: durability. That was on vivid display today.

Jon Wertheim is a senior writer for Sports Illustrated and has been part of the full-time SI writing staff since 1997, largely focusing on the tennis beat , sports business and social issues, and enterprise journalism. In addition to his work at SI, he is a correspondent for "60 Minutes" and a commentator for The Tennis Channel. He has authored 11 books and has been honored with two Emmys, numerous writing and investigative journalism awards, and the Eugene Scott Award from the International Tennis Hall of Fame. Wertheim is a longtime member of the New York Bar Association (retired), the International Tennis Writers Association and the Writers Guild of America. He has a bachelor's in history from Yale University and received a law degree from the University of Pennsylvania. He resides in New York City with his wife, who is a divorce mediator and adjunct law professor. They have two children.
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