In 1984, Mansell finished in the championship top 10 for the first time, and took his first career pole position but still finished behind teammate de Angelis, who finished third, in the championship. At the 1984 Monaco Grand Prix Mansell surprised many by overtaking Alain Prost in a wet race for the lead, but soon after retired from the race after losing control on the slippery painted lines on the road surface on the run up the hill on lap 15. Late in the season, Lotus announced the recruitment of Ayrton Senna for the following year, leaving Mansell with no race seat at Lotus. After receiving offers from Arrows and Williams, and first turning down Williams's offer, it was announced before the Dutch Grand Prix that he would indeed be joining Williams.