Yuki Takahashi sustained a broken finger when he crashed out of the Catalunya Grand Prix on the first lap yesterday.
The Scot Honda rider's race ended immediately after he fell while trying to overtake Chris Vermeulen's Suzuki.
"My bike was good, and the feeling was excellent. So I said to myself, 'let's go,'" said Takahashi.
"He braked sooner than expected and to avoid him, I went wide. I broke my little finger against his bike."
The Japanese rider will miss today's test due to the injury.
Rumours had suggested that Takahashi would be dropped from the Scot team after Catalunya due to a lack of sponsorship and the arrival of 250cc graduate Gabor Talmacsi, who rode Takahashi's spare in Spain. But the team currently appears keen to continue running both riders.
Unsurprisingly given that his first taste of a MotoGP bike came in Friday practice, Talmacsi spent the weekend at the foot of the timesheets acclimatising to the machine.
"After four laps, in which I tried to keep the pace of the others, I understood that that was not my rhythm, so I decided not to take risks," he said after finishing 17th.
"This is learning time for me. I had a lot of fun and I understood a few things, for example, that I want wider handlebars."