The first-half goal from Frieser was the only goal of the game. Barnsley won 1-0 (1-0) at home to Coventry City in the Championship.
The match was even in terms of goals until Barnsley took the lead in the 39th minute through Dominik Frieser, who scored.
Next up, Barnsley face Luton at Oakwell, while Coventry face Blackpool away. Both games are set for Tuesday.