Giovanni Trapattoni says there may be some room for experimentation in Belgrade.
Well, in that case, he may as well go the whole hog and really look at a team with a view to the future.
The one exception is at centre-half, where young Everton defender Shane Duffy could benefit from the experience of Richard Dunne alongside. Keeping Dunne in the fold is vital for the World Cup qualifiers.
Ciaran Clark is worth a try at left-full, and the versatile Marc Wilson can operate effectively at right-back.
With Keith Andrews suspended for Kazakhstan in September, it's worth exploring other options in midfield.
A technically comfortable trio of Darron Gibson, Keith Fahey and James McCarthy can offer a different dimension, flanked by James McClean and Aiden McGeady, who should have less defensive responsibility in this system.
Kevin Doyle may still be the best man to lead the line for the qualifiers, but Shane Long deserves a start.
My team to face Serbia -- Westwood; Wilson, Dunne, Duffy, Clark; McGeady, McCarthy, Fahey, Gibson, McClean; Long.