By Chelsea correspondent Tony Hughes

Jamie Vardy and Riyad Mahrez have been urged to stay at Leicester in the January transfer window by Frank Lampard.

The Chelsea legend watched as the in-form duo tore his former club apart on Monday night as Leicester won 2-1 to reclaim top spot in the Premier League.

Vardy opened the scoring in the first half when he volleyed in Mahrez’s cross and the Algerian doubled the advantage after 48 minutes with a magnificent strike.

The Leicester pair have scored 26 Premier League goals between them this season, seven more than the entire Chelsea team.

Asked about Leicester’s chances of winning the title, Lampard told Sky Sports’ Monday Night Football programme: “I can’t see them quite staying the distance. But top four is definitely there for them now, if they carry on playing the way they did there.

“I think it’s important they keep their players in January, people will come in for Vardy, might come in for Mahrez. If the players themselves are smart they will stay where they are as the club has momentum, they’re playing great football and individually they have momentum.”

Record-breaker: Jamie Vardy has taken the Premier League by storm this season

Record-breaker: Jamie Vardy has taken the Premier League by storm this season

Lampard, who spent a decade at Stamford Bridge and won three Premier League titles, admitted that his former team-mates struggled to contain the pair.

“What impressed me about Vardy and Mahrez is they are putting fear into other teams,” said Lampard. “You can see Azpilicueta is over covering because he knows they can hurt him.

“If he (Mahrez) carries on playing like that until the end of the season he win Player of the Year and take them into the top four. Him and Vardy are unstoppable and unplayable at the moment.”