Chelsea are watching Heerenveen winger Arber Zeneli.
The Kosovo international, 23, is out of contract in June and could be snapped up for a cut-price fee of just £5m.
Chelsea are expected to watch him in action against Ajax this weekend along with a number of Premier League clubs, says Sky Sports.
We revealed yesterday that Chelsea have a deal in place for AZ Alkmaar defender Justin de Haas.
The 18 year-old is expected to move to Chelsea at the end of the season when he comes off contract at AZ.