Manchester United reportedly failed with an approach to sign Kieran Trippier from Atletico Madrid on deadline day.
The Red Devils were eager to bring in a new right-back this summer to provide competition to Aaron Wan-Bissaka.
According to Sport1, United had their sights on sealing Trippier’s signature, but they were far off from meeting the valuation.
The club were prepared to pay £18m for the ex-Tottenham man, but Atletico were holding out for at least £28m.
Tomiyasu’s arrival was sealed on deadline day. The Gunners reportedly paid around £17m up front for him.
The deal could rise to £19.5m with performance-based add-ons included.
Trippier has less than two years left on his contract, and United could revisit their interest at the turn of the year.