FORGET his bad back and forget his row with Stan Wawrinka and put your money on Roger Federer turning on the style this week to round off a year to remember.

The Swiss maestro is in Lille, France, preparing to get his hands on the only major trophy he's never won, the Davis Cup.

It would be the perfect way for him to end an amazing 2014 which has seen him recover from a horrific 12 months to charge back up the world ranking to his current No. 2 slot.

Despite his withdrawal from the ATP World Tour Finals title match against Novak Djokovic on Sunday he's shown enough this year to confirm that the old Federer magic is back.

Five tour titles and an epic Wimbledon final against world No. 1 Djokovic were evidence of the 33-year-old tennis legend's renaissance. Now he is looking to lead Switzerland to glory in their final clash with France.

Yesterday Federer tweeted a photo of himself with his Swiss team-mates and said: "It's great being with the boys again."

This show of unity came in the wake of reports of a ­bust-up with Wawrinka at the end of their towsy semi-final at the O2 Arena in London on Saturday.

It was claimed the reason the compatriots fell out was due to Federer's wife Mirka heckling Wawrinka at key points.

Of equal concern to Federer was the back injury he suffered during the match - which brought back memories of his "annus horribilis" in 2013.

His performances last year - the first time since 2002 that he didn't reach a major final - saw him slip to seventh in the rankings and left him fearing he could not return to his best due to injuries and loss of form.

"Things were difficult, it was a hard year," the 17-time grand slam winner admitted. "I had to put in a lot of effort mentally and physically to get back in shape and find a solution to how I was going to get back."

Federer fired his coach Paul Annacone and replaced him with Wimbledon legend Stefan Edberg. He also switched to a much bigger-framed racket.

The changes paid immediate dividends. He reached the final of the Brisbane International and the Australian Open semis.

Federer then won titles in Dubai and Halle before his five-set loss to Djokovic at Wimbledon and further tour victories in Cincinatti, Shanghai and his Swiss home town of Basel.

He said: "Everything's been really good this year. Right at the start I played very well in Australia. That was quite a surprise for me because I thought it was going to take until March or April to find my best game.

"Wimbledon was definitely a highlight - getting to the final and getting as close as I did to Djokovic. That, to me, proved that I was back where I belong and back where I wanted to be.

"I have been able to really shift gears and I've had a great finish to the season so far."