Aleksandar Mitrovic's ready to go head-to-head with Newcastle United team-mate Ciaran Clark.
Mitrovic kept up his phenomenal scoring run for Serbia with a strike in Saturday's 3-0 win over Moldova.
A victory over the Republic of Ireland in Dublin tomorrow night would all but secure the Group D leaders a place in next summer's World Cup with two games to spare.
Mitrovic says he will "enjoy" facing Clark and former United colleague Daryl Murphy, now at Nottingham Forest.
“It may be the case that I’ll be marked by Ciaran and will enjoy that challenge,” said the 22-year-old.
“I will also get to see a former colleague, Daryl Murphy, but the focus will totally be on beating Ireland.
“We know Ireland will come out fighting, and have a full house in Dublin supporting them. This will be much harder test than Moldova, but we deserve to be in first place and want to stay there.
"We are not even thinking about slipping to second and settling for a play-off spot at this point.
“Our Serbian team is in a good place right now. We have not qualified for a major tournament since 2010, but this team needed to grow and now we see the good work resulting in our top position.”
Mitrovic will miss Newcastle's next three games through suspension after admitting a Football Association charge of violent conduct.
He was caught on video elbowing Manuel Lanzini late in Newcastle's 3-0 win over West Ham United last month.
Mitrovic and Clark scored in the Premier League game.