Right-back Serge, our new signing from PSG, played the full 90 minutes for Ivory Coast as they secured a 3-0 victory away to Gabon.
The result saw Ivory Coast, who are managed by former Belgium boss Marc Wilmots, take control of African Group C in their quest for qualification for Russia 2018.
Ben also played the full game as Wales beat Austria 1-0 in Cardiff.
Serbia remain four points ahead of third-placed Wales in European Group D with three games remaining, but Wales are now just two points behind second-placed Republic of Ireland.