Arsenal manager Jonas Eidevall says the club's recruitment needs to be "better" after they had two world-record bids rejected for Manchester United and England striker Alessia Russo.
United turned down an offer of almost £500,000 from Arsenal for the 23-year-old on transfer deadline day.
"Last summer we got one player too little, now we have done that again here in January," said Eidevall.
"I'm disappointed. Over time these things have a big impact."