Crewe 1-2 Stevenage
Second-half goals from Lucas Akins and Marcus Haber saw play-off chasing Stevenage inflict Crewe's first home league defeat since October.
Crewe took the lead when Mathias Pogba cut the ball back for Chuks Aneke to find the net with a first-time shot.
After the break, Akins fired home from close range to level.
And the turnaround was complete after an hour when Haber brushed off Harry Davis and dispatched a low finish under goalkeeper Steve Phillips.