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Cammy Ballantyne has spent the season on loan to Montrose

Under-21 Challenge match: Scotland v Estonia Date: Tuesday 28 March Venue: Paisley 2021 Stadium, Paisley Kick-off: 19:30 BST Coverage: BBC Sport website

Dundee United midfielder Cammy Ballantyne has been called up to the Scotland Under-21 squad ahead of Tuesday's match against Estonia.

He replaces Zak Jules, the defender on loan at Motherwell from Reading who withdrew on Saturday.

Ballantyne becomes the 11th new face in Scot Gemmill's much-changed squad for the friendly at Paisley 2021 Stadium.

The 19-year-old has played 25 times this season on loan to League Two side Montrose, scoring once.

Ballantyne, who has previously been capped at under-17 level, has made two appearances for United, coming on as a substitute against Partick Thistle and Kilmarnock in the final two fixtures of last season.

Scotland Under-21 squad

Goalkeepers: Ryan Fulton (Liverpool, loan to Chesterfield), Devlin Mackay (Kilmarnock, loan to Berwick Rangers), Jack Ruddy (Wolverhampton Wanderers)

Defenders: Alex Iacovitti (Nottingham Forest), Jamie McCart (Celtic, loan to Inverness CT), Jordan McGhee (Hearts, loan to Middlesbrough), Liam Smith (Heart of Midlothian), Greg Taylor (Kilmarnock)

Midfielders: Cammy Ballantyne (Dundee United, loan to Montrose), Chris Cadden (Motherwell), Liam Henderson (Celtic), Stephen Mallan (St Mirren), James Jones (Crewe Alexandra), Dominic Thomas (Motherwell, loan Queen of the South), Ruben Sammut (Chelsea), Joe Thomson (Celtic, loan to Queen of the South)

Forwards: Ryan Hardie (Rangers, loan to Raith Rovers), Jack Harper (Malaga CF), Oliver McBurnie (Swansea City), Paul McMullan (Celtic, loan to Dunfermline Athletic), Lewis Morgan (St Mirren), Craig Wighton (Dundee)