John Isner advances on Sunday at the Western & Southern Open in Cincinnati.

John Isner receives his own Montreal Canadiens jersey on Wednesday from Canadiens Senior Vice President for Public Affairs and Communications Paul Wilson.

John Isner needs three match points to put away Jordan Thompson in the first round of the Coupe Rogers.

John Isner will play Reilly Opelka in his first match of the ATP 250 tournament.

John Isner's victory in Newport marks his first ATP Tour title since becoming a father last year.

John Isner picks up his first ATP Tour title of 2019 at the Hall of Fame Open in Newport

John Isner is through to his second ATP Tour final of the season in Newport.

John Isner begins his pursuit of a fourth Newport title with a three-set victory on Wednesday.

In his first match since March 31, John Isner clinches a straight-sets win over Casper Ruud at Wimbledon.

John Isner falls to 2-6 in his FedEx ATP Head2Head series with Roger Federer, who is now a four-time Miami champion.

One year after lifting his first ATP Masters 1000 trophy in Miami, John Isner finishes runner-up to Roger Federer.

Defending champion John Isner defeats #NextGenATP Canadian Felix Auger-Aliassime to win his 11th consecutive match in Miami.

John Isner will try to reach his second Miami Open presented by Itau final this week.

John Isner won his maiden ATP Masters 1000 title last year in Miami.

Defending champion John Isner is into the Miami quarter-finals for the third time.

John Isner owns a 21-10 record at the Miami Open presented by Itau.

John Isner owns a 21-10 record at the Miami Open presented by Itau.

John Isner looks to go back-to-back at the Miami Open presented by Itau.

Alexander Zverev and John Isner helped out the Greater Humane Society of Miami as part of Miami Unites Day.

John Isner loses just two games on Sunday in his second-round win against #NextGenATP Aussie Alexei Popyrin.

John Isner completed his Acapulco quarter-final victory over John Millman shortly after 2:30 a.m. local time on Friday morning.

John Isner hits a forehand in his quarter-final victory over Adrian Mannarino at the Delray Beach Open.

John Isner poses during the ceremonial puck drop for the NHL game between the Florida Panthers and the Carolina Hurricanes.

John Isner strikes a backhand in his quarter-final against Adrian Mannarino at the Delray Beach Open by VITACOST.com

John Isner closes in on his fourth semi-final at the Delray Beach Open.