One of Europe's most prolific strikers in recent seasons is apprehensive about the €100 million (R1.9 billion) release clause in his current contract.
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Swedish marksman Viktor Gyokeres is a wanted man among Europe's elite clubs.
The Sporting CP man scored 43 goals and provided 19 assists in all competitions last season, and this garnered the former Brighton Hove Albion attacker interest from the likes of Liverpool, Arsenal and Chelsea.
While there were rumours of a possible return to the Premier League, what might have deterred suitors over seriously pursuing Gyokeres is his reported €100 million release clause.
The Stockholm native was recently asked about the massive price tag placed on him by the Portuguese giants, and he expressed concern about it.
"They (Sporting) wanted most of the starting players to stay and held us tight," the 26-year-old told Sport Bladet.
"That's how it turned out, but I enjoy Sporting very much, so for me it was no problem to stay.
"Of course, you want to play at the highest level.
"It [the release clause] was probably a bit too much because nothing came of it. Of course, it's a lot of money.
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"But we'll see what happens next window… I enjoy myself very much in Sporting and can't complain about anything, so it's absolutely no problem for me to stay. Of course, you aim to test other leagues and a higher level, but I have no stress."
