 Complete the following phrase:  On 7 May 2015, in a game in which he featured as right back until Coke entered the field in the 58th minute  he was often used by manager Unai Emery in that position during the campaign Vidal scored twice and also provided an assist to Kevin Gameiro, in a 30 home win over ACF Fiorentina in the semi-finals of the UEFA Europa League. He started in 