Robert Lewandowski of Bayern (bottom) celebrates his opening goal against his former team yesterday. Photo: AFP

Arjen Robben converted a late penalty on Saturday as Bundesliga leaders Bayern Munich claimed a 2-1 victory over Borussia Dortmund, who have now lost their last five league matches.
The defeat leaves Dortmund 16th in the table and amongst the relegation places as Robben scored his sixth goal in his last six games against Borussia to add to their misery.
With seven points from their first ten Bundesliga games it is the worst start to a league season in Dortmund's history.
They are also the only team in Germany's top flight to have lost seven games this season.
Marco Reus gave Dortmund a first-half lead only for Bayern's striker Robert Lewandowski to score against his old club before Robben converted an 85th-minute penalty.
The Allianz Arena clash got off to a frantic start as Robben and Dortmund's Henrikh Mkhitaryan both clipped the woodwork in the opening five minutes.
Reus, who Bayern chairman Karl-Heinz Rummenigge has admitted Munich want to sign at the end of the season, headed home an inch-perfect Pierre-Emerick Aubameyang cross on 31 minutes.
But with the lion's share of possession, Bayern battered the Dortmund defence and their goalkeeper Roman Weidenfeller kept Borussia in the match with a string of saves.
The hosts drew level when Lewandowski snapped up a loose ball on the edge of the area and drove his shot inside the far post on 72 minutes.

Robben then broke Dortmund hearts when he converted a penalty after Borussia centre-back Neven Subotic held back Bayern wing Franck Ribery in the area.
The win keeps Bayern four points clear and there is now a huge 17-point gap between Munich and Dortmund in the table.
Earlier, VfL Wolfsburg climbed to second with a 4-0 hammering of VfB Stuttgart as ex-Chelsea midfielder Kevin de Bruyne shone.
De Bruyne netted his first goal of the season and created another two as Wolves picked up their sixth straight win in all competitions.