Midfielders:
Starter - CM - Declan Rice
While Rice saw some minutes against the Czech Republic, his outstanding form in the Premier League this season warrants him making a full start on Monday.
Starter - CM - James Ward-Prowse
Ward-Prowse is another man on form in the Premier League. While he didn't feature against the Czech Republic, it would be great to see him start against an inferior Montenegro side.
Starter - CM - Ross Barkley
Barkley has seen increased playing time at Chelsea recently and looked good after coming on early against the Czech Republic. Giving him a start here can only help his confidence moving forward.
Bench - Dele Alli
Alli can be the spark that turns a game for England, particularly when they are playing opposition who will be looking to nullify the attacking threat. Southgate may choose to use him as a substitute option if this turns out to be the case on Monday.
Bench - Eric Dier
The versatile defensive-minded option injured himself early against the Czech Republic and so will almost certainly not be risked against Montenegro.
Bench - Jordan Henderson
While Henderson was exceptional at the World Cup, he's been a little less impressive this season with Liverpool and therefore might be benched against Montenegro as Southgate looks to evaluate alternative options at the position.