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 manager Brendan Rodgers said on Tuesday Tierney had “definitely” agreed to rejoin the club in the summer. The Athletic previously reported the full-back was in talks with Celtic about a pre-contract deal that would allow him to...