Paul Dummett says Newcastle United team-mate Aleksandar Mitrovic will pose a physical threat for Serbia against Wales.
Mitrovic, 22, has netted five goals for Newcastle this season and scored two goals in Serbia's 3-2 World Cup qualifying win over Austria in October.
Defender Dummett will join the Wales squad this week ahead of Saturday's World Cup qualifier in Cardiff.
"I'm sure they'll ask me a bit about him," Dummett said.
"I'll be giving them all the information I know about him to the coaching staff.
"He's a big physical presence and showed how much danger he caused in the game [the 2-1 win over Cardiff on Saturday] with how physical he is, when the ball goes in the box and how he holds it up.