"We're very confident that Andy will return to racing in the course of the current season, but it's unclear when and where. The only certainty seems his absence from the Olympics, because they really come too early," team manager Johan Bruyneel said.
Luxembourg's Schleck, the 2010 Tour de France winner who sat out of this year's edition because of his pelvic injury, is still scheduled to take part in the Vuelta a Espana in August.
The RadioShack-Nissan statement said that Schleck had been in Basel, Switzlerland, undergoing clinical examinations and an MRI scan to the injury he suffered at the Criterium du Dauphine earlier this season.
"The MRI scan showed clear signs of a good healing, but the fracture is not fully healed yet," team doctor Andreas Goesele explained.
"This makes us feel optimistic that with some minor modifications of his bike position, temporary of course, he can now look at being a pro cyclist again and train like his colleagues soon."
The rider himself explained his disappointment at the delay in recovery, but added that he was doing other sports to keep fit and expected to be back in the saddle soon.
"I went on my bike for the first time three weeks after the crash, but it had to step off almost immediately," he said.
"The recovery is not going as fast as I had hoped for, but the examinations of yesterday have shown that it's going in the right direction.
"I have been doing quite a lot of alternative sports, mainly swimming. Basically everything I can do without pain was good. I didn't want to believe that my season had come to full stop in that crash."
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