The club's medical staff, led by Dr. Markus Braun, confirmed on Monday that , and are all facing spells on the sidelines in the wake of the 1-1 draw in Hanover.
The most serious injury was suffered by Blaszczykowski. The Poland international had to be replaced by Kevin Großkreutz shortly before half time in the AWD-Arena on account of a knock to his left ankle, which has now been confirmed as ligament damage. The 26-year-old winger is expected to be out of action for a six-week period.
Central defender Hummels started Sunday's match despite having complained of a back problem suffered in last Wednesday's 1-1 stalemate with Manchester City in the UEFA Champions League. Yet it was a different ailment that forced the 23-year-old off, after a heavy knock to his right foot ended the Germany international's participation at half time.
Race to return
Hummels now faces at least two weeks of recovery before he will be able to return to team training, meaing he will be miss Germany's upcoming FIFA World Cup qualifiers against the Republic of Ireland and Sweden.
Bender is looking at a similar lay-off after the midfielder suffered an eye injury in a clash with Hannover striker Didier Ya Konan.