Bridges and Kewell have remained in touch since the winger's move to Merseyside.
The match at Anfield is Kewell's first meeting against his former Leeds team-mates following six years at Elland Road.
"Harry's doing well at Liverpool and he's enjoying it there," Bridges said on the official Leeds website.
"We were good mates and we still keep in touch. It was sad to see him go, but come Saturday he won't be a friend, there'll be no favours. The lads have played against him so we know what he can do, which is a bit of a plus.
"Players always seem to score against their old team," Bridges added, "but hopefully we'll keep him quiet and he will have an off day."
With Leeds lying just above the bottom three following a 1-0 defeat at home to Manchester United on Saturday, Liverpool are also struggling as they have lost their last three league matches.
Bridges added: "We did well against Manchester United and deserved more than we got. The lads were devastated in the dressing-room. They thought we deserved a point because everybody worked hard.
"If we can take that to Anfield I think we can come away with something," he insisted. "We're looking for a similar defensive effort. If we can go into it the same as Manchester United then we hope it will come good. The players are all behind the gaffer and hopefully we can go and get a result."