World number one Novak Djokovic says tennis now has a 'big five' following Stan Wawrinka's US Open triumph.
Wawrinka beat Djokovic in four sets on Sunday to win his third Grand Slam.
"He plays best in the big matches and definitely deserves to be mentioned in the mix of top players," said Djokovic.
But world number three Wawrinka, who said he was crying with nerves before the final, insisted he was "really far" from the 'big four' of Djokovic, Andy Murray, Roger Federer and Rafael Nadal.
That illustrious quartet have won 42 of the past 47 Grand Slams, though Wawrinka now has the same number of major titles as Olympic champion Murray.