“We’ve need to repeat the pace, aggression and organisation of our performance in the first leg.”

Arnautovic has played a bit-part role at Inter but has had an impact in recent weeks with crucial goals, Saturday’s being his fifth in his last 10 club appearances.

Inzaghi’s team are gunning for a repeat of the Serie A, Champions League and Italian Cup treble they conquered under Jose Mourinho 15 years ago.

Arnautovic, 35, was on loan at Inter from FC Twente when Inter beat Bayern to win the Champions League in 2010, but he said “it was a bit like I was a fan cheering the team on”.

“Obviously we believe in the treble because we’re Inter, but there’s a long way to go,” said Arnautovic, who played just three times for Inter under Mourinho.

Earlier Venezia boosted their survival hopes by beating rock-bottom Monza 1-0 and moving to within two points of Lecce who sit just outside the relegation zone and are at Juventus later on Saturday.

Juve will move into the top four with a win in Turin, with third-placed Atalanta hosting Bologna — in fourth — on Sunday.