LONDON, England - Lewis Hamilton has cleared the air with Mercedes Formula 1 team mate Nico Rosberg after the title-chasing pair fell during the 2014 Monaco GP.Hamilton, who lost the overall lead in the Drivers' championship to Rosberg after the latter ended Hamilton's run of four wins in a row, took to Twitter on Friday to declare fences had been mended."We've been friends a long time and, as friends, we have our ups and downs. Today we spoke and we're cool, still friends #noproblem," declared the 2008 champion.DISTINCTLY UNSMILINGThe tweet was accompanied by a link to a photograph of the two on unicycles and smiling, from their teenage years.Briton Hamilton was distinctly unsmiling in Monaco after Rosberg controversially won pole and went on to win the showcase race for the second consecutive year.Hamilton had suggested, after qualifying, that Rosberg had deliberately run wide in the final seconds, bringing out yellow warning flags and forcing him to slow when he might have gone faster than the German."We are not friends, we are colleagues," he said after the race.Rosberg - he and Hamilton have known each other since they were karting team mates - offered a different perspective on Sunday even if Hamilton had shunned him on the podium."We've always been friends, we always will be friends," the German had said," but friends is a big word. What exactly is 'friends'? We have a good relationship and work well together."