The Standard Life Great Britain men's side lost their final Olympic warm-up game 79-56 to Belgium in Antwerp on Sunday afternoon.
With Luol Deng, Dan Clark, Robert Archibald and Joel Freeland rested, Tottenham-born Pops Mensah-Bonsu led the GB attack with 18 points and 10 rebounds. Eric Boateng also had a double-double of 12 points and 15 rebounds.
Despite defeat, the Brits were strong on the rebounding statline, picking up 40 boards to Belgium's 30.
GB got off to a bad start as Belgium took advantage of their overall depth, leading 14-2 half-way through the first quarter. Great Britain then settled into the game and stayed in touch after the first, trailing 21-15.
Belgium continued to press GB and led 30-18, as GB only managed three points in five second quarter minutes and at half-time, Belgium led 39-24.
Mid-way through the third GB were trailing 47-30 and heading into the final period, Belgium led 58-37.
The fourth was a formality, with the Belgians assured of victory. GB put up a brave fight but couldn't finish their Olympic preparations with a win.
Captain Dan Clark scored 23 points but it was not enough for Great Britain to avoid a 69-63 defeat against hosts the Netherlands in their opening game of the invitational tournament in Leiden on Friday.