Juve are three points clear of AC Milan with only nine points of the season remaining.
"We have to play these last three games in the same manner which we have shown already this season," said midfielder Vidal.
"We have to fight for the ball from the very first minute until the final whistle. We have to win by battling.
"It'll be tough against Lecce on Wednesday as they need points to survive, but we need points to win the championship."