Nico Rosberg unsure how he beat Lewis Hamilton in late 2015 run

Nico Rosberg says he does not know how he managed to turn the tables on Mercedes team-mate Lewis Hamilton and end the season with a run of success. Hamilton won the title with three races to go, all of which Rosberg then won. Rosberg said: "Qualifying, he did a better job - up to the point he won the title it was 12-three or something. "That was my strength last year. Strange it turned around. Tough to understand it. I don't know exactly why; I just need to keep it going." Hamilton won the title in 2014 despite qualifying behind his team-mate more often than not, passing Rosberg on track a number of times to take 11 wins to the German's five.