(Picture: AFP/Getty)

Roger Federer claimed that ‘it’s almost time to retire’ after his first-round US Open win, after maintaining his 100% record in opening ties in Flushing Meadows.

The 37-year-old Swiss is coming towards the end of his career, but has kept any potential retirement plans largely under lock and key.

However, unprompted, the 20-time Grand Slam champion hinted that he may be hanging up his racquet rather soon.

When asked about his unbeaten record in 18 first-round matches at the US Open, he replied: ‘I’m very happy to be back here in New York healthy.

‘The last couple of years have been difficult so it’s nice to be back feeling really good.

‘I’m happy I never stumbled at the first hurdle.

‘It’s almost time to retire… but not yet!

‘I’m happy I played well tonight.’

His retirement statement was greeted with a smattering of boos from the New York crowd and generated plenty of panic on social media.