Prost retained Olivier Panis, but dropped second driver Shinji Nakano and replaced him with Jarno Trulli. Trulli had started 1997 with Minardi but then substituted for Panis when he broke his leg at the Canadian Grand Prix. Meanwhile, Nakano joined Trulli's old team, Minardi, to replace his retiring countryman Ukyo Katayama. He was partnered by rookie Esteban Tuero, who was promoted from a testing role as he was preferred to the outgoing Tarso Marques. Marques would eventually return to F1 in 2001, also with Minardi.