The Red Bull Salzburg player, 22, is valued at around £2m, and has made 42 appearances so far this season.
The Mirror claims that Saints chief scout Bill Green went to Austria to watch him in action, and the Premier League club are now ready to firm up their interest.
Mauricio Pochettino's side are ninth in the table.
| Team | P | W | D | L | F | A | GD | PTS | |
| 1 | Everton | 5 | 4 | 1 | 0 | 14 | 7 | 7 | 13 |
| 2 | Aston Villa | 4 | 4 | 0 | 0 | 12 | 2 | 10 | 12 |
| 3 | Liverpool | 5 | 3 | 1 | 1 | 13 | 13 | 0 | 10 |
| 4 | Leicester CityLeicester | 5 | 3 | 0 | 2 | 12 | 8 | 4 | 9 |
| 5 | Arsenal | 5 | 3 | 0 | 2 | 8 | 6 | 2 | 9 |
| 6 | Wolverhampton WanderersWolves | 5 | 3 | 0 | 2 | 5 | 7 | -2 | 9 |
| 7 | Tottenham HotspurSpurs | 5 | 2 | 2 | 1 | 15 | 8 | 7 | 8 |
| 8 | Chelsea | 5 | 2 | 2 | 1 | 13 | 9 | 4 | 8 |
| 9 | West Ham UnitedWest Ham | 5 | 2 | 1 | 2 | 11 | 7 | 4 | 7 |
| 10 | Leeds UnitedLeeds | 5 | 2 | 1 | 2 | 9 | 9 | 0 | 7 |
| 11 | Manchester CityMan City | 4 | 2 | 1 | 1 | 7 | 7 | 0 | 7 |
| 12 | Southampton | 5 | 2 | 1 | 2 | 8 | 9 | -1 | 7 |
| 13 | Newcastle UnitedNewcastle | 5 | 2 | 1 | 2 | 7 | 9 | -2 | 7 |
| 14 | Crystal Palace | 5 | 2 | 1 | 2 | 6 | 8 | -2 | 7 |
| 15 | Manchester UnitedMan Utd | 4 | 2 | 0 | 2 | 9 | 12 | -3 | 6 |
| 16 | Brighton & Hove AlbionBrighton | 5 | 1 | 1 | 3 | 9 | 11 | -2 | 4 |
| 17 | West Bromwich AlbionWest Brom | 5 | 0 | 2 | 3 | 5 | 13 | -8 | 2 |
| 18 | Burnley | 4 | 0 | 1 | 3 | 3 | 8 | -5 | 1 |
| 19 | Sheffield UnitedSheff Utd | 5 | 0 | 1 | 4 | 2 | 7 | -5 | 1 |
| 20 | Fulham | 5 | 0 | 1 | 4 | 4 | 12 | -8 | 1 |
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