A penalty from Robert Lewandowski has given champions Bayern Munich a slender advantage over Mainz 05 this afternoon.

With the Bavarians due to receive the Bundesliga trophy at the end of the contest, there was a lively atmosphere inside the Allianz Arena, but that failed to inspire the two sides to produce an entertaining half of football.

After skipper Philipp Lahm wasted his headed chance in the sixth minute, it wasn't until Lewandowski stepped up that another chance was created.

It was in the 25th minute when Mainz's Niko Bungert was penalised for handball and Bayern's Polish striker, who had a dispute with teammate Jerome Boateng in training earlier in the week, converted the resultant kick from 12 yards out.

As the half drew to a close, Dante had the chance to double Bayern's advantage, but he failed to make a clean connection with Xabi Alonso's cross.