Nelson Piquet Junior claims he was treated "like a dog" after his involvement in a 2008 controversy which paved the way for Lewis Hamilton to win his first Formula 1 drivers' championship.
Hamilton clinched the title in a dramatic final race of the season, overtaking Timo Glock at the death to pip rival Felipe Massa to top honours. However, that outcome was only made possible by a slip-up from Massa in the Singapore Grand Prix, a few weeks before the finale in Brazil.
Massa is considering his legal options after comments from former Formula 1 chief executive Bernie Ecclestone about the Singapore race. The comments relate to Piquet being instructed by his team to crash deliberately, setting in motion a chain of events which allowed Piquet's Renault team-mate Fernando Alonso to stand atop the podium.