Roger Federer serves ace to his critics .

Roger-FedererRoger Federer have served an ace to his critics who have been  writing off  . The Swiss legend  has decided to commit himself  till  the end of next year after the Swiss  signed up to play at the Stuttgart grass court tournament for the next two years.

Organisers revealed on Monday, claiming Federer had agreed to play in the  tournament, which will be switching  from clay to grass for the first time back in June, beyond next year.Having been post Wimbledon this year, the ATP Stuttgart Open will be played before the grass court Grand Slam in 2016.

“I watched the first (grass court) edition on television, it had a great atmosphere. I’ve always wanted to play Stuttgart, but it was always the wrong time after Wimbledon,” said Federer.

“Now that they’ve moved dates, the chance to play the Mercedes Cup is very exciting — I can’t wait.”

The seven-time Wimbledon champion also said he was happy that  there would be a one week gap  between the end of the French Open and the start of Wimbledon next year, giving players sufficient time to adapt to  clay court from grass .

“It’s genius to have an extra week. It doesn’t sound like much, but for us players it’s a lot,” said the 34-year-old.

“I love playing on grass — always have, always will. To play another tournament on grass is great for me. I can manage my energy and schedule. It’s all about winning titles.”

Previously, Federer had been tightlipped about his long-term future, committing only to his schedule next year.

“Wimbledon is a big one. Rio as well but it’s not my number one priority. It starts with the Australian Open which is just around the corner,” he said following his loss to Novak Djokovic in the title match at the ATP Tour Finals on Sunday.

“Once that’s over then I look more towards the future.”