Manchester United scouts were posted to San Sebastian yesterday.
Football Transfers says United scouts were in attendance as Real Sociedad defeated Real Mallorca 1-0.
Brais Mendez was the matchwinner, though it was two other players who were being watched by United.
La Real midfielder Martin Zubimendi and attacker Takefusa Kubo are on United's radar.
United see Zubimendi as a successor for veteran Casemiro, while Kubo is viewed as a replacement for outcast Jadon Sancho.
