Hannibal Mejbri scored the first and made the second as Birmingham City made it back-to-back Championship victories by comfortably winning the West Midlands derby against West Bromwich Albion.
The on-loan Manchester United midfielder's superbly taken low curling 10th-minute free-kick earned the Tunisian his first senior goal.
He then swung over the right-wing corner from which Polish midfielder Krystian Bielik also claimed his first goal for the club seven minutes into the second half.
While Blues built on their 4-3 comeback win at Swansea last Saturday, it was under-par Albion's third defeat in four league and cup games.