 Complete the following phrase:  Despite his success with the national side, Valcareggi is also remembered for devising the infamous staffetta relay match strategy during the 1970 World Cup. Due to his focus on defensive stability, as well as the presence of two pure, prolific goalscoring strikers, Riva and Boninsegna, Valcareggi felt that it would not be possible to field Italys two most revered advanced playmakers at the time, Gianni Rivera, and Sandro Mazzola, alongside each other. He believed the two creative players to be incompatible with each other, due to the rivalry between their respective clubs, and as he felt that deploying both players alongside the forwards would offset the balance within the starting line-up, in particular as Rivera, unlike Mazzola, was not renowned for his athleticism or defensive work-rate. When Mazzola had come down with a stomach flu, which affected his fitness, he therefore conceived the plan, which essentially consisted of Mazzola playing the first half of each match, whilst Rivera would play the second half when the opponents would begin to tire and offer him more space. Despite Italys victory at the 1968 European Championship and their second-place finish at the 1970 World Cup, the tactic was widely criticised by the media, in particular due to Italys negative performance during the group-stage and in the 