Tottenham extended their unbeaten run but missed the chance to go fourth with a goalless draw against Chelsea.

Chelsea's Asmir Begovic was the busier goalkeeper in the first half, keeping out Son Heung-min's header and Mousa Dembele's low drive.

Playing up front, Eden Hazard forced Tottenham keeper Hugo Lloris into a low, reflex save from a superb volley - their only shot on target.

The point saw Chelsea to move up a place to 14th in the Premier League.

Spurs striker Harry Kane also tested Begovic, while Pedro was wayward with a couple of strikes from outside the box.

It was a fair result in a London derby which petered out in the second half after Tottenham's trip to Azerbaijan and Chelsea's match in Israel in midweek.

Chelsea were much improved compared with other times this season, but there seems to be a lack of harmony between boss Jose Mourinho and striker Diego Costa.

Mourinho decided to drop the Spain international, 27, to the bench after admitting the pair had "a few kisses and cuddles" after an argument during their Champions League win at Maccabi Tel Aviv.

They may need to make up again after Costa petulantly threw his bib towards his Portuguese manager after failing to be sent on as a substitute.

Hazard was deployed as the furthest man forward at White Hart Lane, and the Belgium forward's hard-working performance saw him make 71 sprints - more than any other player on the pitch.

He should have done better with a headed effort which went over the bar in the opening period and was thwarted by Lloris' excellent save.

The Blues kept their third clean sheet in a row in all competitions, but the lacklustre stalemate means the defending champions have won just four times in 14 league games this season.

On the other hand, Tottenham are still unbeaten since the opening day at Manchester United and have now gone 13 without defeat in the Premier League for the first time.

However, they have drawn half of their matches and an inability to be clinical in front of goal may hinder any prospects of finishing in the top four.

Spurs' defence, marshalled by the impressive Belgium duo Jan Vertonghen and Toby Alderweireld, has conceded just 11 goals, but at the other end striker Kane was kept quiet.

The England international went into the game on a run of nine goals in six games, but his side will need him to make a difference in the big matches, like he did in the 5-3 victory in last season's corresponding fixture.