Never slow down - just after the game came out I was winning by 2.5 seconds but had 3 seconds of penalties going into the final straight at Kyoto - Yamagiwa (I had run wide at the last chicane on lap 3 of a 4 lap race). I raced hard to try to build up a gap of more than 3 seconds but he stayed in touch and since it was probably going to be his first win I should just let him cross the line first so I backed off completely. He crossed the line in first and I coasted across the line about 1.5 seconds after him, only to discover he had 1 second of penalty time left to serve so if I'd just carried on racing to the finish I would've won the race.
FWIW it was his first win.