Borussia Monchengladbach edged past Werder Bremen 1-0 thanks to defender Nico Elvedi's second-half header on Tuesday, their third win in four league matches this year that lifted them to sixth in the Bundesliga.
Gladbach, with Breel Embolo out of the squad following allegations he broke COVID-19 lockdown rules and Marcus Thuram suspended, were rarely dangerous up front until Swiss international Elvedi's superb header in the 66th minute from a free kick.
Werder's Leonardo Bittenocurt then fired narrowly over the bar from 10 metres out a minute later.
The Foals, who face Manchester City in the Champions League Round of 16 next month, are unbeaten so far this year and on 28 points. Werder are 12th on 18.
Leaders Bayern Munich, on 36, travel to Augsburg on Wednesday.