Hadden said: "I continue to be impressed with the competition for places in the squad. A number of players have maintained their good form from the World Cup but they are going to be pushed extremely hard by some of our young, up and coming talent in the next few weeks."
Scotland squad for training at Murrayfield on Monday 14 January:
Backs - Mike Blair* Ben Cairns * (both Edinburgh), Chris Cusiter (Perpignan)*, Simon Danielli (Ulster), Nick De Luca (Edinburgh), Thom Evans (Glasgow Warriors), Phil Godman (Edinburgh), Rory Lamont (Sale Sharks), Rory Lawson (Gloucester)*, Calum MacRae (Edinburgh), Graeme Morrison, Dan Parks (both Glasgow Warriors), Chris Paterson (Gloucester), Hugo Southwell (Edinburgh), Nikki Walker (The Ospreys), Simon Webster (Edinburgh)
Forwards - John Barclay*, Johnnie Beattie*, Kelly Brown* (all Glasgow Warriors), Dave Callam (Edinburgh)*, Alasdair Dickinson (Gloucester)*, Ross Ford (Edinburgh)*, Jim Hamilton (Leicester Tigers), Nathan Hines (Perpignan), Allister Hogg*, Allan Jacobsen (both Edinburgh), Alastair Kellock (Glasgow Warriors)*, Gavin Kerr (Edinburgh), Moray Low (Glasgow Warriors), Scott MacLeod (Llanelli Scarlets), Euan Murray (Northampton Saints)*, Ross Rennie (Edinburgh)*, Alasdair Strokosch (Gloucester)*, Fergus Thomson (Glasgow Warriors)* and Jason White (Sale Sharks) CAPTAIN
Injured but invited to the training session:
Andrew Henderson (Glasgow Warriors) - knee injury; Simon Taylor (Stade Francais) - thumb injury; and Rob Dewey (Ulster) - knee injury
* = Member of Scottish Institute of Sport