1986, Nigel Mansell & Nelson Piquet – Williams
Formula One World Champions Nelson Piquet and Nigel Mansell’s relationship took a hit during the course of the 1986 season when they were teammates in Williams. Piquet’s woes were initially limited to fuming about not being granted No. 1 status, but things were bound to get worse. Mansell handed the Brazilian some humilating defeats and their squabbling allowed Alain Prost to take the title in 1986.
1988, Alain Prost & Ayrton Senna – McLaren
It was a feud that began in 1988 when Senna was roped in to partner Prost in McLaren. Both drivers looked to stifle was accused of blocking Prost at the Portuguese Grand Prix and the following year, he allegedly broke a pact with Prost at the San Marino GP that would have seen The Frenchman win. The rivalry peaked in 1989, when the title was to be decided between the duo at Suzuka.
2007, Fernando Alonso & Lewis Hamilton – McLaren
Hamilton’s second-placed finish behind Alonso in the 2007 Monaco Grand Prix was perhaps a sign of things to come. The Briton suggested after that event that he was prevented from racing his teammate. The rivalry between the two intensified at the Hungarian Grand Prix when Alonso, who had set the fastest time, was relegated five places on the grid for preventing Hamilton from leaving the pit lane in time to complete his final qualifying lap.
2013, Sebastian Vettel & Mark Webber – Red Bull
The pairing at Red Bull since 2009 had its own share of sparks and tension along the way. Webber and Vettel’s relationship nearly broke down at the 2013 Malaysian Grand Prix. Assured of victory after a fourth pit-stop following a pre-race pact, Webber was in for a clear run to the chequered flag. However, Vettel ignored team orders and overtook Webber for the win.