The International Tennis Federation, which organises the four Grand Slam tournaments as well as the Fed Cup and Davis Cup, said it would be in contact with the UAE's tennis federation.

BBC: Dubai faces censure over Peer ban

Not long ago, Monfils was the best junior tennis player in the world he won three of the four junior Grand Slam titles in 2004 and a can't-miss champion of the future.

WSJ: Monfils Looks Back in Form at the French Open

The French Tennis Federation's move means that in the space of six months, three of the four Grand Slam tournaments have boosted their purses in the face of players' demands, with Wimbledon expected to announce this year's prize levels later this month.

WSJ: More Prize Money at French Open Tennis