Thompson said: "We're getting to the really difficult stage of the UEFA Cup now . It will be a difficult game against Marseille. They're a big club with a great history. We could have been drawn against someone a lot easier, but it's true to say we could have met even stronger teams too.
"It's coming around extremely quickly but we enjoyed the two Levski games and put in a great performance to get a great result in midweek.
"It will be nice for Gerard to return to France and there are some old adversaries in the Marseille team in Fabien Barthez, David Sommeil - who used to play for Manchester City - and Steve Marlet.
"There's still some work for us to do. A couple of decent performances don't make a season. And some of the things which have been going on off the field have been very disappointing to me as a Liverpool supporter. To say I'm upset is a bit of understatement.
"But now we're striving to end the season as well as possible by sticking together."