Marseille Open tournament director Jean-Francois Caujolle has likened Australia's Nick Kyrgios to a young Roger Federer.
Roger Federer currently has 97 singles titles and is second on the all-time list behind Jimmy Connors, who has 109 titles.
Ricky van Wolfswinkel joined Norwich City from Sporting in 2013 and struggled to impress during his three-year spell in England.
The Swiss world number one has until 12pm EST [5pm GMT] to decide whether to play his third tournament of 2018.
Federer became the oldest player in the game to claim the number one title when he reached the semi-finals of the Rotterdam Open.
Roger Federer's wife Mirka created a "bubble" for Federer which allowed him to concentrate only on tennis.
Roger Federer was officially crowned the oldest world number one on 19 February, it was the first time he returned to the top of the rankings since 2012.
Federer became the oldest world no.1 in tennis history at the Rotterdam Open last week and managed to win his 97th ATP title in Holland.
The International Tennis Federation (ITF) have revealed the player breakdown for tests conducted last season.
Federer recently admitted he is looking forward to retiring, but his former fitness trainer Dorochenko thinks he will be gracing courts around the world for a little while longer.
The 12-time grand slam champion continues to work with a resistance band as his rehabilitation advances further.
Roger Federer's father Robert believes his son's reign as the oldest world number one could be over soon depending on how well Rafael Nadal plays upon his return.
Roger Federer becane the oldest world number one in ATP history following his win over Robin Haase at the Rotterdam Open.
Safarova, one of the oldest female players on the tour at the age of 31, has praised Federer's evergreen nature.
Being at the top of the men's game has always been important to Federer Jr despite him spending part of 2016 out of the sport.