BERLIN, Aug. 12 (Xinhua) -- Bayern Munich cruised into the second round after beating fourth-division tier Energie Cottbus 3-1 on Robert Lewandowski's brace to conclude the first round in German Cup on Monday.

The defending champions needed only a couple of minutes to take full control of the proceedings on the pitch whereas the hosts' Energie Cottbus kept all their men behind the ball.

Nevertheless, it took the "Bavarians" 14 minutes before they got their first chance on target as Cottbus goalkeeper Lennart Moser tipped Robert Lewandowski's effort to the bar.

Despite their dominance Niko Kovac's men had to wait until the 32nd minute before Robert Lewandowski capitalized on Kingsley Coman's blocked header to tap home the opener from close range.

Lewandowski should have doubled the lead moments later but Moser was on guard to deny the striker with a reflex from sharp angle.

Bayern continued relentless as Coman rattled the woodwork with a diving header from the edge of the box in the 39th minute.

After the restart, Bayern Munich needed some time to gain a foothold into the second half.

Just when Energie Cottbus grew in confidence, Coman doubled the lead out of nowhere after drilling the ball into the far post corner to beat Moser from 19 meters in the 65th minute.

The visitors' showed no mercy and tripled the lead in the 85th minute when Lewandowski deflected a shot from Leon Goretzka to put the result beyond doubt.

However, the hosts were able to score their consolation as Goretzka brought down Berkan Taz inside the penalty area. The midfielder stepped up and converted the penalty to mark the final 3-1 score.

Elsewhere, Wolfsburg needed 120 minutes to see off resilient third division club Hallescher FC 5-3. Matthias Fetsch's 3-3 equalizer in the dying seconds of the second half forced ten-men Wolfsburg into the overtime.

Despite their numerical disadvantage, Robin Knoche and Josip Brekalo provided one goal each to help the "Wolves" to book their berth for the second round.