Great Britain beat Belgium 84-80 in their opening game at the Tel Aviv tournament after a dominant performance from Pops Mensah Bonsu.
The former CSKA Moscow forward had 26 points and 9 boards as Chris Finch's men overturned a 45-36 half-time deficit.
Ogo Adegboye enhanced his claim on the point guard role by adding 20 points and six assists.
"It's a decent start to the tournament, Belgium are a good team and have had some good results in their previous games," said Finch.
"I was disappointed by how we played in the first half because we let them push us around, but the guys came out in the second half and turned things around by being the more assertive team.
"We had some good performances from the younger players such as Dan Clark, Ogo Adegboye and Eric Boateng and I'm looking for us to continue that against Israel tomorrow. They will give us a really good challenge, and that's what we need at this stage of the summer."
GB face hosts Israel on Tuesday.