A few things have built my confidence up. I moved to Tampa and started training with John Isner]. The climate there, the structure there has really helped me in a lot of ways," [Sock told *SI.com*.

INDIAN WELLS, CALIF.—What’s it like to have 6-foot-9 John Isner toss the ball high over his head and reach up to serve it to you? I got as close as a non-opponent is going to get today.

Alexander Zverev received one encouraging message from a couple of former American tennis stars as John Isner and Sam Querrey ...

John Isner thinks we won't be seeing the last of Novak Djokovic in 2025 as the American expects the Serb to continue playing beyond this year. It is not a secret that apart from winning the Paris ...

Former American players John Isner and Sam Querrey believe that Germany’s Alexander Zverev’s best chance of winning a Grand Slam is at the French Open.

To my complete shock, I see that a match at Wimbledon is in the fifth set, tied at 48. John Isner and Nicolas Mahut. Playing in a set that started this morning. As has happened only once ...

Former American tennis player John Isner shares his well-wishes for Novak Djokovic in the 2025 season. The big-serving American believes the Serb has what it takes to win big titles again this year.

Sam Querrey and John Isner felt the Serb would conquer the unprecedented ... I'm sure he had a great training block in the Maldives with everyone else. So, he's going to come out hot in January ...

During a conversation with former tennis player John Isner at the Youth Inc. podcast, retired NFL quarterback Drew Brees talked about his childhood with tennis star Andy Roddick.