State television RAI have announced that the terms have all been agreed with £26m going to the German club and a four-year contract worth a total of £17.5m.

The story emerged when one of Diego’s sponsors reportedly admitted that the move to Turin was only a matter of details now.

Bianconeri director of sport Alessio Secco insisted the allegations are not true. “We have not concluded any deal.”

Coach Claudio Ranieri is the biggest stumbling block now, as he has said repeatedly that Diego’s attacking midfielder characteristics do not suit his 4-4-2 formation.

As Juve are struggling of late with two straight Serie A defeats that knocked them down to third place, changing the tactics to suit the summer arrival seems far more likely.

The Brazilian talent turns 24 in a couple of weeks and already has 28 Selecao caps under his belt. He has played for Bremen since 2006.

It would be an immense bargain for the German side, who paid £4.5m for Diego less than three years ago to tempt him from Porto.