Middlesbrough have ended their transfer window with the arrival of Adlene Guedioura from Watford.
The Algerian is believed to have cost in the region of £4million and has signed a two-and-a-half year deal at the Riverside.
Serbian international Branislav Ivanovic has ended his eight-year association with Chelsea by completing a move to Zenit St Petersburg.
Mamadou Sakho has departed Liverpool in order to complete a move to Crystal Palace on loan for the rest of the season.
Southampton have signed striker Manolo Gabbiadini from Napoli in a deal worth a reported £17million.