"They're never satisfied with what they have" - Patrick Mouratoglou gives some insight into the mind of a champion

Renown coach Patrick Mouratoglou, who has worked with Serena Williams for several years, gave his thoughts on the mindset of what separates great champions from the average player.

Having worked with Williams for so long, Mouratoglou has firsthand experience as to the inner workings of a great champion.

"I've been lucky to work with a lot of great players and champions," Mouratoglou said on the Joe Pomp show. "And I'm friends also with great champions, and I can tell clearly that they don't process the same way as other people at all.

"They have a different way to process. "One of the things that this very different is that they're never satisfied with what they have. They have this constant will to get more and the level of expectation for themselves and for the team is so much higher."

Williams, a 23-time Grand Slam champion, is 40 and hasn't played since last year's Wimbledon due to an injury but the American is not ready to retire as she attempts to make a comeback and capture a record-tying 24th Grand Slam title.