Great Britain's men's basketball team were beaten 73-69 by Tunisia in Antwerp in their penultimate warm-up game before the London Olympics.
With Luol Deng and Joel Freeland rested, Pops Mensah-Bonsu led all scorers with 21 points for GB.
Dan Clark, who scored 13 points, suffered an ankle injury and will miss Sunday's final warm-up against Belgium.
With a week to go before GB's first Olympic game, Mike Lenzly is also struggling with a calf muscle injury.
Lenzly's potential replacement for the Olympics, Ogo Adegboye, scored 13 points, his highest total of the summer.
Chris Finch's side's first Olympic encounter is against Russia on Sunday 29 July.
They had led after each of the first three quarters against Tunisia, before collapsing in the final period, failing to score a point in the last five minutes.