Newcastle United have completed the signing of Kieran Tripper from Atletico Madrid on a two-and-a-half-year deal.
The England international is the first arrival at St James' Park following the Saudi Arabian-backed takeover in October, joining for a fee reported to be in the region of £12million plus add-ons.
Tripper returns to the Premier League following a two-and-a-half-year stint with Atletico, having previously played for Tottenham and Burnley in the English top-flight.
The full-back will aim to bolster the Newcastle defence and help them climb out of the relegation zone, with the Magpies only winning one league game all season. They currently sit 19th, two points from safety.
The 31-year-old also links up with Eddie Howe for a second time, the pair having previously crossed paths at Turf Moor in 2012.
"I'm delighted to be joining this fantastic club. I really enjoyed my time in Madrid, but when I became aware of interest from Newcastle United, and having worked with Eddie Howe before, I knew this was where I wanted to be," Trippier told the club's official website.
"I'm aware there is a lot of work ahead of us but I know the demands of Premier League well and I know what an amazing club this is with very talented players. I can't wait to get started and I'm excited to step out at St. James' Park as a Newcastle player."
Introducing the first signing of our new era...— Newcastle United FC (@NUFC) January 7, 2022
Trippier made 68 LaLiga appearances for Los Rojiblancos, helping Diego Simeone's side capture the domestic title last season.
The full-back contributed to the success with six assists; Jose Gaya (seven) the only defender to record more in the Spanish top-flight in 2020-21.
Trippier also registered 74 successful crosses during his time in LaLiga, with Jesus Navas (129) and Damian Suarez (84) the only defenders to better that tally.
Although he has failed to record any goals or assists across all competitions this season, there is no doubt in the quality and experience the England defender will bring to the Magpies' ranks.
Indeed, he played five of the Three Lions' seven matches as they reached the Euro 2020 final last year.
Howe said: "I am really pleased to welcome Kieran to Newcastle United. I have long admired his abilities and have followed his career, so when the opportunity arose to secure him, we didn't hesitate.
"A lot of hard work has gone into planning for the January transfer window long before the month began, which is clear in how quickly we have been able to complete this move."
Newcastle have also been linked with a move for another full-back, this time for the left flank, in the form of Everton defender Lucas Digne, who is out of favour with Rafael Benitez following a reported training-ground disagreement.
Digne, however, is reported to prefer a move elsewhere as it stands, with West Ham and Chelsea also said to be interested.