Lyon striker Alexandre Lacazette is expected to complete a club-record £45m move to Arsenal on Wednesday having completed a medical.
The Gunners had an initial bid for the 26-year-old France international rejected, but talks continued.
His fee, of up to £52m with add-ons, will surpass the £42.4m Arsenal paid Real Madrid for Mesut Ozil in 2013.
Lacazett, who has won 11 caps for France, was the second-highest scorer in Ligue 1 last season with 28 goals.
His move to north London is likely to be completed later on Wednesday in order for the announcement to fall in line with the French stock market, on which they are listed.