Hamilton and Rosberg had been teammates at Mercedes since 2013, and by the summer of 2014 the relationship had curdled into open rivalry as both men fought for the same championship in what was comfortably the fastest car on the grid. At Spa, early in the race, Rosberg attempted a move on Hamilton through the Les Combes section — and his front wing made contact with Hamilton's rear-right tyre, puncturing it instantly and ending Hamilton's afternoon.
Rosberg continued, his car undamaged enough to carry on to a points finish, while Hamilton limped back to the pits with a race-ending puncture. In the aftermath, rather than the usual diplomatic language around a racing incident, Rosberg said plainly in the post-race press conference that he hadn't backed out of the move because he wanted to 'prove a point' — an admission that turned a routine wheel-to-wheel racing incident into something closer to a confession.
Mercedes launched an internal investigation into the incident, a remarkable step for a team to take against its own driver over an on-track moment, and Rosberg was fined by the team and required to do promotional work as a consequence — an unusually public internal punishment that confirmed just how seriously the team took the breakdown in trust between its two title contenders.