Borussia Monchengladbach propelled themselves into third place in the Bundesliga as Marcus Thuram struck twice, taking a knee in celebration, in a 4-1 demolition of Union Berlin.

Needing a victory to move above RB Leipzig and Bayer Leverkusen, Gladbach produced a dominant performance at Borussia-Park on Sunday - aside from one lapse in concentration.

Some shoddy marking from a set-piece gifted Sebastian Andersson a goal five minutes into the second half, as Union hauled themselves into contention following Florian Neuhaus' opener and a Thuram header.

Union's fightback was short-lived, though, with Thuram helping himself to a second before the hour and Alassane Plea on target late on as Gladbach moved back into the Champions League places.

Neuhaus tried his luck with an ambitious effort from inside his own half 13 minutes in, forcing Rafal Gikiewicz into a full-stretch stop, with Union's goalkeeper then denying Thuram.

Yet Gikiewicz was beaten in the 17th minute, Neuhaus shrugging off Marvin Friedrich before slotting a low finish in off the left-hand upright.

And Gladbach had their second four minutes before the break - Thuram heading in from Plea's precise cross and subsequently celebrating by taking a knee, likely in relation to tensions over perceived racism in the United States.

But Gladbach's lead was reduced in the 50th minute, Andersson on hand to nod home from Marcus Ingvartsen's fortuitous knockdown.

Patrick Herrmann looked set to restore the two-goal cushion a few moments later, only to drill an effort into the side netting under pressure from Keven Schlotterbeck.

Ramy Bensebaini went close with a free-kick, but Gladbach did not pass up their next opportunity - Plea again teeing up Thuram.

Plea turned from provider to scorer with nine minutes left, coolly finishing from Bensebaini's cross to add further gloss.