Premier League leaders Everton have signed England under-21 captain Ben Godfrey from Norwich in the first big deal on English transfer deadline day.
The 22-year-old, who can also play in midfield, signed a five-year contract for an undisclosed fee, with media reports suggesting the deal will cost Everton STG25 million ($A45 million).
"The aim for me at Everton is to win trophies and win games," Godfrey said.
"I like to win. I wear my heart on my sleeve. I care and I am a passionate lad. The fans can guarantee they will get 110 per cent out of me when I am on the pitch."
Godfrey is the fifth man to join the club in this transfer window, joining James Rodriguez, Niels Nkounkou, Allan and Abdoulaye Doucoure.
Manchester United are expected to be among the most active English clubs on transfer deadline day with several big names linked with a move to Old Trafford.
Porto full back Alex Telles is expected to complete a switch while United have also been linked with Borussia Dortmund winger Jadon Sancho and clubless Uruguay forward Edinson Cavani.
United were humiliated 6-1 at home by Tottenham Hotspur on Sunday which could add urgency to their business before the transfer window shuts at 11pm (Tuesday 0900 AEDT).
Chelsea are reportedly looking to sign Declan Rice from West Ham while Crystal Palace striker Wilfried Zaha has been linked with a move to Arsenal or Everton.
Champions Liverpool, themselves thrashed 7-2 at Aston Villa on Sunday, are expected to be quiet in the transfer market, though a number of players could leave the club, including winger Xherdan Shaqiri.