Max Sanders’ first-half goal lifted Leyton Orient back into the League One promotion picture with a 1-0 win at Stevenage that saw the hosts drop out of the play-off positions.
Sanders scored the only goal of the game in the 16th minute when, after being found in the box, he shifted the ball onto his right foot before sliding a shot under Craig MacGillivray.
Stevenage striker Jamie Reid thought he had pulled his side level 24 minutes in but referee Craig Hicks disallowed his goal for an apparent handball against Jordan Roberts.
Boro’s top scorer threatened once more when he flicked Dan Butler’s free-kick into the hands of visiting goalkeeper Sol Brynn as Orient survived again.
Home boss Steve Evans made four substitutions at half-time in a bid to turn things around.
However, Stevenage could only muster three hopeful efforts in the second half, from Reid, Roberts and Nick Freeman, as they dropped to eighth in the table, just three points above Orient.