BERLIN, Feb 10 (Reuters) - Mainz 05 failed to strengthen their grip on a European spot on Sunday after drawing 1-1 at relegation-threatened Augsburg, who have now gone five games without a loss. Mainz, who are fifth on 31 points, struggled to settle into the game with Augsburg who were out to extend their four-game unbeaten run that has helped them off the bottom spot and close in on the relegation playoff berth. ... More...