Hector Barbera has apologised to Dani Pedrosa and the Repsol Honda team following Sunday's incident in the San Marino Grand Prix, which has severely dented Pedrosa's MotoGP title hopes.
Pramac Racing's Barbera ran into the rear of Pedrosa's factory RC213V on the opening lap, with both riders crashing out.
Pole sitter Pedrosa had been forced to start from the back of the grid after problems with the front wheel of his RCV just before the restart.
Pedrosa then scythed through the field in the opening corners and was inside the top ten, before his race was brought to an abrupt end by Barbera.
Yamaha's Jorge Lorenzo took full advantage, winning the race to stretch his gap at the top of the MotoGP championship.
Barbera, returning to action after a six-week lay-off, lost the front end of his Ducati and later admitted full responsibility for the incident.
“It's a shame. I was impatient to get back on the track, but my adventure finished too early to enjoy myself,” he said.
“Unfortunately, when I followed Dani's wheel I lost my braking point and hit the brakes far too late.
“I tried to slow the bike down, but I lost grip on the front. I'm very disappointed, even more so because I took out Dani in the process and that was the last thing that I wanted to happen.
“It was my fault that he crashed out and I apologise profusely to him for that,” he added.
“I also apologise to my team that worked so hard this week. Now I have to wait another two weeks, but I will be ready for the Spanish round.”
Francesco Guidotti, the Pramac team manager, added: “Héctor really did not mean it. We are sad, in particular because the crash caught up the World Championship contender, Pedrosa.
“Héctor was trying to gain places but he lost his braking reference and hit the brakes too hard, losing grip and sliding into Dani.
“All the Pramac Racing Team apologise to Pedrosa and his crew.”
Barbera's MotoGP future is in doubt after Ben Spies and Andrea Iannone were announced in an all-new 2013 Pramac line-up.