Southampton boss Ronald Koeman was in Holland on Sunday for the KNVB Cup final.
Koeman saw FC Groningen beat PEC Zwolle to lift the Cup.
The Dutchman used the occasion to make a personal check on Groningen winger Albert Rusnak.
The former Manchester City midfielder is being linked with Saints, along with a return to the Etihad.
Rusnak joined Groningen only in January after being released from his City contract.