Jonathan Rea admitted he may have been overconfident entering Saturday afternoon's Superpole session at Portim?o.

While sitting first after his opening flying lap, Rea fell at speed at turn three, crashing heavily and prematurely ending his session.

With the majority of the field bettering their times late on, Rea was pushed down the order, eventually ending the 15-minute shootout in eighth.

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Rea put in a fine race run on Saturday morning and he believes this impressive speed may have caused him to push beyond the limits.

"I felt really confident for Superpole and maybe too much. I pushed over the limit and was quite a bit faster at the braking point, with 4 degrees more lean angle, and I lost the front. It was a fast crash but I am OK.

"In the afternoon practice session before Superpole we had a very good rhythm. My race pace is really good the only problem is starting from the third row and the guys with good pace are on the front row."

Looking ahead to Sunday's races, Rea believes a good start will be crucial as he seeks to be in the victory fight by mid-distance.

For me tomorrow will be about the start and the first laps. I just have to make sure the opening laps are clean and that I can get through traffic. I think the race will be decided from the middle to the end but I have to make sure I am there at the middle point."