This was followed by the final win of his F1 career at Montreal in – again at the expense of longtime rival Mansell, whose Williams-Renault stalled past the old pits on the last lap while leading. In late 1991, Piquet's teammate Roberto Moreno was replaced by Michael Schumacher, who remained for the rest of the season. He had talked to the Ligier and Ferrari teams about securing a drive, but Piquet then announced his retirement from Formula One in January 1992 to concentrate on his business activities.