Johnny Cardoso has only been at Real Betis for a few months, but his performances are already attracting interest from some of Europe's biggest clubs.

According to a report from Diario de Sevilla, La Liga giants Barcelona and Atletico Madrid have expressed their interest to the representatives of the U.S. men's national team midfielder.

In addition to that pair, there is also interest from German powers Borussia Dortmund and RB Leipzig, as well as unnamed clubs from the Premier League and Serie A.

The 22-year-old only joined Betis from Brazilian side Internacional in December, moving to La Liga in a transfer worth a reported EUR6 million.

Cardoso has impressed since making his Betis debut against Barcelona in January, drawing rave reviews for his displays while starting almost all of the club's league matches since then.

The holding midfielder has a release clause of EUR80m in his current contract, but the report from Diario de Sevilla states that Betis could be open to a sale for EUR30m.

That figure could rise if a bidding war emerges for Cardoso, who is understood to be happy with his new club. Betis, for its part, doesn't want to lose Cardoso, but would also be willing to sell if it could make a huge profit on a player who only just joined the club.

Cardoso has earned 11 caps for the USMNT, and is expected to be a big part of Gregg Berhalter's plans in the upcoming Copa America.

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