After 15 minutes at Cardiff City Stadium, the Manchester United attacker suffered what looked like a concussion.
The ex-Swansea City winger competed with Besiktas defender Domagoj Vida for a high ball and the Welshman finished on the ground, looking like he suffered a concussion.
But, after receiving medical treatment, James returned to the pitch and played the full 90 minutes of the Group E Euro 2020 qualifier.
After the match, Giggs said: “The physio came over but there was no problem. We did all the (concussion) tests at half-time and he was fine.
“He stayed down and was a bit streetwise. He told the doctors, ‘I’m not moving, I’m just sitting still.’