Mouratoglou says she is on track especially having the dates for the next tournament and that preparation has been stepped up ahead of Lexington, where Serena Williams will compete.

"She's doing well. She's practised really well and as much as she can. When you have a date for your next tournament; that's the extra motivation all the players need because they are used to having short-term goals.

They all have long-term goals but without the short-term goals; it is difficult to have 100 per cent dedication. And she is practising every day, very seriously. When you know you are going to play soon, suddenly you lock-in.

The opportunity to play competition is so important for the preparation and that's why Serena is playing at Lexington because she needs those matches like everyone. The ones that have played and have several matches under the belt is such a huge advantage."