LONDON – Arsenal have bolstered their defence with the signing of 22-year-old Scotland international left back Kieran Tierney from Celtic on a long-term deal, the clubs confirmed on Thursday.
The £25 million transfer fee makes Tierney, the most expensive player to be signed from the Scottish Premiership, surpassing the £20m Olympique Lyonnais paid Celtic for centre forward Moussa Dembele last year.
“Celtic agreed to permanently transfer registration of Kieran Tierney to Arsenal Football Club for a record single amount of 25 million pounds,” the Scottish club said in a statement.
Tierney, who came up through Celtic’s youth ranks and helped the Scottish club seal a domestic treble last season, is Arsenal’s fifth recruit of the transfer window.
They also signed Brazilian Gabriel Martinelli, Dani Ceballos on loan from Real Madrid, centre back William Saliba, who has been loaned back to St Etienne for the season, and winger Nicolas Pepe in a club record deal last week.