Robin Dutt’s men threatened early on, but third-placed Dortmund rarely looked in danger of dropping points and Lewandowski’s first league goal since November 30, after excellent work by Marcel Schmelzer, sent the visitors on their way in the 26th minute.
Henrikh Mkhitaryan doubled Dortmund’s lead just before the break, demonstrating quick feet on the edge of the area prior to a clinical finish.
After a cagey opening, Schmelzer robbed Theodor Gebre Selassie of possession near the corner flag before cutting a pass back to Lewandowski, and the Poland star confidently caressed a finish into the bottom-right corner.
Mkhitaryan should have finished a well-worked move in the 37th minute as he diverted Pierre-Emerick Aubameyang’s header into the side netting, but made amends four minutes later.
The Armenian jolted past Assani Lukimya on the edge of the area and, having been afforded space by the home side’s defenders, drove a low shot past Raphael Wolf and into the bottom-left corner
Jurgen Klopp's side effectively wrapped up the three points three minutes into the second period as Hunt inadvertently flicked on a Dortmund corner and the unmarked Friedrich prodded home.
Lewandowski rounded Wolf and slotted through Sebastian Prodl’s legs with composure to grab his second, but it was Bremen who completed the scoring as substitute Aycicek converted at the back post.
