Middlesbrough are chasing PSV Eindhoven pair Jeffersen Farfan and Arouna Kone.
The Evening Gazette says Boro were represented in Holland on Sunday where they were believed to be watching the PSV winger Kone.
The 24-year-old, who recently turned down the chance of a move to Turkish club Galatasaray, played the full 90 minutes of PSV's 2-0 win at Heracles Almelo. Farfan is also interesting Boro, but is currently sidelined with an ankle injury.