Chelsea boss Thomas Tuchel has tipped Cristiano Ronaldo to have "a huge impact" at Manchester United following his arrival from Juventus.
At one stage, it appeared likely that Ronaldo was heading for Manchester City before Man United agreed a deal with Juventus in the final stages of the summer transfer window.
The Portugal international will make his second debut for the 20-time English champions in Saturday's Premier League clash with Newcastle United at Old Trafford.
Tuchel has claimed that Man United "were strong" without Ronaldo and will now be an even tougher proposition, having managed to re-sign the highest international goalscorer of all time.
"They were a super hard team to play against and beat last season. They were close to winning a European trophy and finished second place. So they were strong before the signing of Cristiano Ronaldo," Tuchel told reporters.
"I think he will have a huge impact. He is a true champion and has proved at any level, in any year, he can perform at outstanding levels. And don't forget, he will have an impact every day with the group, it's not just goals and assists."
Chelsea will be looking for their third Premier League victory of the season when they welcome Aston Villa to Stamford Bridge in Saturday's late start.