If I remember right its in the rain isnt it and yu have about 4-5 laps to catch up and win?
Take it slow at the beginning and making sure you dont spin. After about 2 laps the tyres will come to you and you can pretty much go flat out, the other cars low right down (Theyre all on the wrng tyres by now) and it should be an easy win.
Hardest one for me was the Alonso challenge, They all seemed so much fast than me. Had to to just blast past them all at the start and hold them up for 5 laps. Hard work but managed. Rest are a breeze.