Sevilla midfielder Vicente Iborra admits he is worried over the prospect of Arsenal target Grzegorz Krychowiak leaving the club before the summer transfer window closes. Krychowiak, 25, rose to prominence in Spain last season, excelling in a holding midfield role as Sevilla regained the Europa League title, confirming their return to the Champions League.

The Poland international has a release clause of €30m (£22m, $33m), with Sevilla sporting director Monchi warning his suitors earlier this summer that his prized midfielder wants to stay at the Andalusian club in an interview with AS.

The presence of Arsenal scouts during Sevilla's Uefa Super Cup defeat to Barcelona further fuelled talk of an imminent bid from North London, although Arsene Wenger talked down the club's interest in the player later that week. Nevertheless, his teammate Iborra admits there is still doubt over whether the 25-year-old will still be at the Estadio Sanchez Pizjuan when the transfer window closes on September 2.

"Of course I am concerned that Krychowiak could be taken away," Iborra told Estadio Deportivo. "I always want to have the best players in the team. He brings so much. I hope he stays. I understand Sevilla's position, it is clear, and I hope nobody pays that clause, and he stays with us."

Arsenal's only first team addition this summer has been goalkeeper Petr Cech, but a holding midfielder remains on the wishlist of many fans and former players. Francis Coquelin, who currently occupies that role, has come in for criticism in his opening two games of the season and former player Charlie Nicholas believes that area of Arsene Wenger's squad must be strengthened.

"Arsenal are strong and I've tipped them to win the Premier League but I would still like to see them sign another holding midfield player," he told Sky Sports. "Francis Coquelin will be walking a tightrope every week because of the way he plays and he'll pick up suspensions, so another defensive midfielder would be good. Wenger's got Mikel Arteta, who can do a job there, and he's also got a couple of young kids who he wants to fill that role, but I think he'll let Mathieu Flamini go."