Kieran Tierney will spend the rest of the season at Arsenal before joining Celtic in the summer after agreeing a pre-contract deal with the Scottish club. Arsenal manager Mikel Arteta is keen for the 27-year-old to stay at the Emirates instead of leaving in this window because of his leadership qualities and the injury problems his side have faced.

Celtic have agreed to a deal to re-sign defender Kieran Tierney from Premier League side Arsenal and are trying to get the transfer over the line by the end of the January transfer window, manager Brendan Rodgers said.

Arsenal have signed United States defender Jenna Nighswonger from Gotham FC on a permanent deal on transfer deadline day. The fee is believed to be £80,500 and Nighswonger becomes Arsenal's first signing of the January transfer window.

Arsenal have completed the signing of USWNT defender Jenna Nighswonger from Gotham FC. reported on January 27 that Arsenal were finalising a deal for the former NWSL rookie of the year after the two teams had agreed to terms and a transfer fee of $100,