Paul recounts the moment that changed his mindset: "When I saw my friends working in offices, I told myself that tennis wasn't so bad.
Tommy Paul broke into the Top 10 for the first time in his career after the Australian Open.
In an interview with the Tennis website, he admitted that it wasn't until he was 21 that he began to feel motivated by the sport:
"Between the ages of 18 and 21, I'd see all my friends having the time of their lives at university. I thought: 'I should have done the same thing.
But then I saw them all working in offices, and I thought: 'Okay, what I'm doing isn't so bad.
So I started to improve and to enjoy going out on the courts to train. I started to take it very seriously. It's my job, but at the same time, I'm having fun."