Arsenal have made a bid, believed to be around £30 million, for Ajax's highly-rated Dutch international defender Jurrien Timber.
Numerous Premier League clubs, including Manchester United, have been linked with Timber.
The 22-year-old has two years left on his current deal.
It is thought Ajax want in excess of £30m, although personal terms are not thought likely to be a problem if an agreement over the fee is reached.
The Gunners, who finished second in the Premier League last season, are optimistic about completing a deal.
However, other clubs, including Bayern Munich, are known to be interested in signing the player this summer.