Dani Pedrosa was unimpressed with a "rare move" from Valentino Rossi during the Aragon MotoGP but the daring Italian was praised by Marc Marquez following his remarkable premature return.
Rossi suffered a double fracture of his leg only a few weeks ago, but the Yamaha rider finished fifth in his comeback at Motorland on Sunday after being passed fit.
Seven-time MotoGP champion Rossi started third on the grid, but was unable to secure a podium finish as Marquez extended his lead with a victory ahead of Pedrosa and Jorge Lorenzo.
Runner-up Pedrosa felt Rossi was guilty of a dangerous move when he attempted to defend his position as the Spaniard tried to pass with eight laps remaining.
"Valentino made a rare move on the straight, left on the edge at 300 km/h and it was a little tight," Pedrosa said.
"It was not good, but luckily I was able to overtake him and I was able to continue to reach the podium."
Pedrosa's team-mate Marquez had more positive words for Rossi.
"It was already incredible to be here after this kind of fracture. I think nobody had done it," said the defending champion.
"Also incredible that he finished only five-tenths behind [Maverick] Vinales, with the same bike, and with this injury. His talent makes the difference I think."