Andy Schleck has shaken off concerns that he could struggle to make a mark at this year’s Tour de France after the Radioshack-Leopard rider made a less than convincing start to the new season in Australia last week.

The 27-year-old Luxembourger struggled in the Adelaide heat and abruptly returned to his hotel after a mechanical problem in Sunday’s final stage ended his Tour Down Under campaign prematurely.

Still fighting to recover from a broken pelvis suffered during the Criterium du Dauphine last June, Schleck, however, remains confident he will be in prime shape for the 100th edition of the Tour de France starting in Corsica on June 29.

“I have no doubt I have the engine to come back,” said Schleck, who was almost 40 minutes behind the leader when he abandoned on Sunday.

“It’s just a matter of working well and doing the right things. I need to be patient.”

The crash prior to last season’s Tour de France ruined his 2012 season and an overweight Schleck staged a brief, unimpressive comeback at the Tour of Beijing in October.

“My feelings are a lot better – if you have pictures from Beijing, I was basically a fat pig then,” he said.

“I was 4kg more than now.”