Riyad Mahrez terrorised Championship defences last season - and now the Leicester City winger is set to give the Chelsea back line some troubled times on Saturday.
Mahrez arrived from French side Le Harve in January where he was soon among the goals for the Foxes.
And according to James Sharpe from the Leicester Mercury, he will certainly be one for Jose Mourinho's men to keep a close eye on at Stamford Bridge.
"He's exciting the fans this year," he said. "He set the Championship alight and scored a wonder goal against Blackpool."
Mahrez was one of Algeria's stars in Brazil and became the first City player since Muzzy Izzet in 2002 to represent his country in a World Cup.
Sharpe added: "He's a tricky player and he turned Gareth Barry inside out last week and he's deceptively quick."
City captain Wes Morgan will need to be at his best to shut out Diego Costa and company but Sharpe has no doubt he will be up to the task.
The Foxes skipper will be looking to pick up where he left off against the Toffees where he kept former Chelsea striker Romelu Lukaku quiet at the King Power Stadium on the opening day.
Sharpe said: "He's 30 now and this is his first taste of Premier League football. There were doubts whether he would be quick enough but they seem to have been allayed although he will need another performance like last week especially against Costa."
The third man that the Blues will need to keep a close watch on is striker Leonardo Ulloa.
Leicester handed over £4.8m to Brighton & Hove Albion for the Argentinian in the summer and he started to repay that fee with a goal on his Premier League debut.
"The money they paid was quite a lot for Leicester so in terms of that he is a marquee signing," said Sharpe.
"Therefore a lot is expected of him and the one thing he brings is a big physical presence that was missing up front last season. Leicester got a lot of corners but never really scored from them or other set pieces.
"They had three or four bids rejected and he seemed to be Pearson's number one target.
"He's made a scoring start and they need him to continue doing so if they are going to stay up."
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