Tottenham boss Harry Redknapp has no doubts the addition of Thierry Henry can lift Arsenal to new heights.
Third-placed Tottenham could put further distance between themselves and Arsenal with victory over Everton on Wednesday night.
Redknapp, though, is wary of the lift Henry's return could give their north London neighbours.
"I watched the game and knew Henry would score, it was written, some are meant to happen. It was just amazing," the Spurs boss said.
"I hope he doesn't make too big an impact because we want to finish above Arsenal this season, which is not going to be easy, but I am sure he will have some impact on the football club.
"Having people like that around the place is worth their weight in gold. They make a difference when they walk into the club.
"They are good professionals with good habits, the young players can learn more from watching them every day than they can from being coached by anybody."