Roger Federer and Stan Wawrinka appeared to have put any recent differences behind them after the world number two posted a picture on Twitter of the Davis Cup team-mates looking all smiles.

Reports emerged on Monday that the pair had an argument following their semi-final at the ATP World Tour Finals last week, resulting from a spat between Wawrinka and Federer’s wife Mirka during the last-four en-counter.

Federer had saved three match points in the 10th game of the deciding set and the match was poised at 5-5 and 40-40 in game 11 when Wawrinka gestured to Federer’s box asking that they not make noise in between serves.

Mrs Federer was then heard to call Wawrinka a crybaby, prompting an incredulous reaction from Australian Open champion who went on to lose the match 4-6 7-5 7-6 (8/6).

It was then widely reported that Federer and Wawrinka were involved in a “furious row” behind the scenes.

That would have been a concern for Swiss Davis Cup captain Severin Luthi who leads the team into the final against France on Friday, but the star pair have now put on a show of unity.

“It’s great being with the boys again,” tweeted Federer, above a picture including himself and Wawrinka with arms around each other.

In the shot, world number four Wawrinka makes playful ‘bunny ears’ behind his team-mate’s head.

Of more concern now for the Swiss will be Federer’s fitness after the 17-time grand slam winner was forced to withdraw from Sunday’s London final against Novak Djokovic due to a back injury.