Ajax came from behind to beat AZ Alkmaar and extend their unbeaten run to 14 matches.

The win was Martin Jol's side's 10th in that period and maintained their challenge for the title, as skipper Luis Suarez took his league goals tally for the season to 15 with a brace.

Urby Emanuelson and Gregory van der Wiel got the other goals for the Amsterdam side, while reigning champions AZ have now lost more league games than they have won.

Ronald Koeman's men had the first chance after 15 minutes as Maarten Martens' shot was smothered by Maarten Stekelenburg and Emanuelson then hit the post for Ajax with a shot from 12 yards.

AZ took the lead when Mounir El Hamdaoui rounded off a counter-attack for his seventh league goal of the season.

Ajax levelled 11 minutes into the second half as Emanuelson's cross-come-shot sailed in, and they were ahead two minutes later as Suarez added a stylish second, playing a one-two with former AZ midfielder Demy de Zeeuw before smashing a shot in off the crossbar.

The visitors netted a third in the 65th minute through Van der Wiel's low left-foot shot and Suarez grabbed his second and Ajax's fourth as he turned in a cross from the right in the 90th minute.

Graziano Pelle cut the deficit to two goals with a left-foot shot from the edge of the box as AZ went straight up the other end, but it was a mere consolation.