Beckham arrived in Spain on Tuesday and will watch from the stands as Les Parisiens take on Los Che in the last 16 clash.
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A club statement said: "David Beckham joined the hotel where the Paris St Germain team is in Valencia at 11.30am (10.30am GMT) on Tuesday.
“David Beckham landed at Valencia airport at 11am and was met by assistant team manager Olivier Letang.
"The player, who will wear the No.32, will meet his new team-mates at a lunch before attending tonight's game from the stands at the Mestalla. After the match David Beckham will return to Paris with the PSG team and make his debut practice on Wednesday afternoon at the Camp des Loges."
Beckham joined the Paris club on transfer deadline day as a free agent after spending five years in MLS with LA Galaxy.
He could make his debut for PSG against Sochaux on Sunday.