Roberto Mancini believes Newcastle striker Papiss Cisse has the ability to derail Manchester City's title charge when the two sides meet this weekend.
City defeated Manchester United on Monday night to reclaim top spot in the Premier League with only two games remaining, but face a difficult trip on Tyneside on Sunday.
Cisse has scored 13 goals in 12 appearances for the Toon since joining the club from Freiburg in January and netted a brace as Alan Pardew's side defeated Chelsea 2-0 on Wednesday.
His first was a sumptuous strike past Petr Cech, having teed himself up from a David Santon cross, before adding a second in stoppage time which defied logic.
The Senegalese struck a quite unbelievable swerving half-volley, which flew into the top corner and prompted many observers to declare it one of the best goals in the history of the Premier League.
Cisse is likely to pose an extreme threat to City when they travel to St James' Park for Sunday's pivotal encounter, and Mancini is well aware of the talents the 26-year-old possesses.
"Cisse is incredible. He scored two fantastic goals against Chelsea," Mancini told his weekly press conference.
"He has 13 goals in 12 league games for Newcastle and he's a good player. But not just him, their whole team is playing very well.
"Newcastle played a fantastic game at Chelsea and I think this game will be more difficult for us.
"The Manchester United game was at home and we played very well to win 1-0 but Newcastle is away and I think it will be harder."