Alex Morris' Crewe Alexandra Under 23's went down 2-0 at St Andrews Stadium against Birmingham City.
A Blues side on red-hot form had already won two games within a few days, and they made it three within a week thanks to second half goals from Olly McCoy and Corey O'Keeffe.
Lewis Reilly had a chance that was well saved in the first half, with the confident Blues also testing Dave Richards on a few occassions.
But the hosts took the lead just two minutes into the second period, McCoy fortuitously sliding the ball home with his instep after an attempted pass inside deflected off a Crewe man.
The Blues goalkeeper was forced into a fine save on the hour mark to tip away George Ray's looping header, and City wrapped up the game moments later when O'Keeffe curled a direct free-kick into the top corner.
Next up for Alex Morris' Crewe Under 23's is a contest with Bolton Wanderers at Reaseheath on Monday 26 Feb (1pm).
Crewe: Richards, T.Johnson, Offord, Ray, Sass-Davies, Lynch, Lundstram, Walker, Finney, Barlaser, Reilly