The ex-Manchester City winger has impressed in Eredivisie for both SC Cambuur and FC Groningen, respectively, this season.
Rusnak, 20, joined Manchester City from Slovakian outfit MKF Kosice in 2008, but failed to play a single minute of first-team football for the club following his rise up the ranks.
However, after spending the first half of this season on loan at SC Cambuur, where he recorded four goals and five assists, the Slovakia Under-21 international made a permanent move to fellow Eredivisie side Groningen in the winter and has since been in stellar form.
Adding a further six goals and four assists in 17 games, the former Blues prospect’s reputation in the Netherlands has continued to grow in recent months, while he stole headlines at the weekend after netting both of his side’s goals in the Dutch Cup final to beat FC Zwolle 2-0.
Now his exploits are said to have sparked interest back in England, with the Daily Mirror reporting this week that Aston Villa, Newcastle United, Southampton and Swansea are all tracking his progress.
Even his former club are claimed to be weighing up a move to bring him back to the Etihad Stadium but, while Rusnak has admitted that he is flattered over the links, the skilful midfielder stresses that he is more than content at Groningen for the moment.
“I heard the talk and I have to say, right now I'm an FC Groningen player,” he said. “I have two years left with them and to play Europa League with them next season is another step for me.
"In the future you never know what is going to happen, and I want to play at the highest level possible, but I'm not setting myself a special target for a league or a club.”
Continuing on his decision to leave City, Rusnak added: “To be honest, I felt like I was ready to play first-team football and wanted to go somewhere where I could play week-in-week-out in a good league.
“I think Eredivisie is a good competition for young players and I’m very thankful that I got the chance to come here and have such great success so far.”