Balmacewen won the matches in the top order, but lost those in the lower order, and went down by 12 games overall in the only tie played on Saturday.
The feature match saw Paddy Ou battle back to take the No1 singles 2-6, 6-2, 6-4 against Mitchell Sizemore.
Both young men are heading to the national junior championships this week, along with former John McGlashan team-mate Carlos Reid. Ou has plenty of motivation with his lower ranking, meaning he has to play through qualifying, while Sizemore and Reid are directly into the main draw.
Although Sizemore has more of a power game, with a bigger serve and stronger forehand, Ou was able to keep pressure on with deep drives when under pressure, and throw in some judicious net rushes following low, skidding approach shots.
He also won several points with drop shots as Sizemore found sideways movement more comfortable than coming forward.
Sizemore increasingly found problems with consistency on his backhand and offered more cheap points in the second and third sets.
The doubles, played first, were split, with Ou and Matt McCutcheon taking the top one in straight sets, while Robin Versteeg and Tony Ryder won the bottom one in three sets.
Versteeg and Ryder completed the job with easy singles wins in the lower order while McCutcheon matched them against Damian Hill.
