The game was played at Nuneaton Griff FC, due to Sphinx having one of their floodlights taken down due to some cricket and American Football being played there and saw Paul Green and Andy Moran score for Neil Moran's side.
Both goals came in the second half after Sphinx trailed 1-0 at the break. The Sphinx goals levelled the match only for Boldmere to nick the winner with seven minutes to go.
Sphinx's final game of the season is away to Solihull Moors on Friday night.
Coventry Sphinx hold their presentation evening at the club in Sphinx Drive on Friday May 15th at 7.30pm.