Chelsea have signed Michael Hector from Reading, where the defender will remain for the season as one of the Premier League champions' 32 loan players.
Hector joined Nantes defender Papy Djilobodji in signing for Chelsea on transfer deadline day.
Senegal international Djilobodji will remain with the first-team squad, but the 23-year-old Hector will continue playing at the Madejski Stadium.
"Chelsea Football Club have today completed the signing of Michael Hector from Reading," Chelsea said on their official website.
"The 23-year-old centre-back, who has signed a five-year-contract, will return to Reading and spend the remainder of this season on loan at the Madejski Stadium."
Watford have completed the signing of Colombian striker Victor Ibarbo on a season-long loan.
Ibarbo, 25, spent the last seven months with Italian giants Roma after moving on loan from Cagliari.
Midfielder Adlene Guedioura has returned to Watford from Crystal Palace after signing a three-year contract.
The 29-year-old had two loan spells at Vicarage Road last season and returns on a permanent basis.
The Algeria international was the Hornets' second signing of transfer deadline day after the capture of 19-year-old Belgian striker Obbi Oulare on a five-year deal from Club Brugge.
Watford said on their official website: "Watford FC are delighted to announce that Adlene Guedioura has completed a permanent return to Vicarage Road from Crystal Palace.
"The midfielder has signed a three-year contract and adds further quality and depth to Quique Sanchez Flores' Premier League squad."
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Sunderland have confirmed the signing of Spurs full-back DeAndre Yedlin on a season long deal.
The right-back was pushed further down the pecking order at White Hart Lane following the arrival of Kieran Trippier from Burnley.
West Brom star striker Saido Berahino, who has been subject to four failed bids from Tottenham Hotspur during this transfer window, has hit out at his club on Twitter.
The Baggies have instantly dismissed Tottenham's approaches and remain determined to keep the England Under-21 striker at The Hawthorns, which has prompted Berahino to tweet: 'Sad how i cant say exactly how the club has treated me but i can officially say i will never play Jeremy Peace' (West Brom Chairman).
Berahino had a transfer request rejected last month, with Albion angered by Tottenham's continued pursuit of the 22-year-old.
The Baggies are understood to be unhappy with Spurs' approach to the deal which has only strengthened their resolve to keep Berahino.
Sad how i cant say exactly how the club has treated me but i can officially say i will never play Jeremy Peace.
Tottenham striker Emmanuel Adebayor will not be allowed to leave the club unless he backs down on £5m demand to terminate his contract, Press Association Sport understands.
Both parties are keen to part way, but the Togo forward's lofty demands are likely to see him remain at White Hart Lane until at least the January window.
Chelsea have signed Papy Djilobodji from Nantes and are expected to have 32 players out on loan by the closure of the summer transfer window.
Djilobodji's departure from Ligue 1 for Stamford Bridge was confirmed by Nantes before the Premier League champions announced the deal.
The 26-year-old Senegal international defender has signed a four-year contract with Jose Mourinho's side.
Djilobodji said on chelseafc.com: "I'm very happy to sign for a big club like Chelsea and I want to do my best to help the team win titles. I want to thank the club for giving me this opportunity."
West Brom have rejected a third Tottenham bid for striker Saido Berahino, Press Association Sport understands.
The Baggies are determined to keep hold of the England under-21 star with some reports suggesting it would take more than £25m to prize him away from the club.
Last week, Berahino handed in a transfer request in an attempt to force through a move during the summer window, but he will be staying at West Brom until at least January as things stand.
Watford have signed Belgian teenager Obbi Oularé from Club Brugge on a five-year deal, the Premier League club have confirmed.