The Cottagers carved out a 2-1 victory in the first leg thanks to goals from Zamora and Damien Duff, while conceding late as a header from Alexander Madlung pulled one back for the German champions.
The former Tottenham hitman was unable to feature in Sunday's victory over Wigan Athletic, but the gaffer hopes to have his player fit for the all-important second leg at the Volkswagen Arena.
"Bobby suffers with his Achilles tendon, as do many players," Hodgson told reporters after his side's weekend win.
"The problem with those injuries is that if you get a kick on it, like he did the other day, it makes it worse.
"We were hoping he would recover in time to play against Wigan but didn't. The medical staff are optimistic he will recover in time for Thursday."
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