Besiktas seized the Turkish Super Lig title for the 16th time on Saturday with a 2-1 win away to Goztepe.
Gregg Berhalter said he is "not too happy" with the roster situation at Besiktas that will sideline U.S. winger Tyler Boyd until possibly January.
Liverpool goalkeeper Loris Karius has terminated his loan contract at Besiktas, the player announced on Monday.
Former Turkey keeper Rustu Recber has been taken to hospital after testing positive for the coronavirus and is currently in a "critical period."
Arsenal have sold Nacho Monreal to Real Sociedad and loaned Mohamed Elneny to Besiktas.
United States men's national team midfielder Tyler Boyd has signed a four-year deal with Turkish club Besiktas.
FIFA have told ESPN on Wednesday that they 'have a received a claim from the player Loris Karius against the club Besiktas.'
Loris Karius was loaned out by Liverpool manager Jurgen Klopp at the start of the season following the £65 million signing of Brazil No. 1 Alisson.
The 25-year-old was heckled and jeered by his own fans throughout the game and reports in Turkey suggest his manager would like to bench him.
A Bundesliga winner with Dortmund in 2011 and 2012, the 29-year-old Japan international was originally signed for €350,000 from Cerezo Osaka.
Fulham have signed Dutch international forward Ryan Babel from Turkish club Besiktas on a permanent deal running until the end of the season.
Pepe left Besiktas staff a cash tip as a parting gesture after agreeing to terminate his contract with the Turkish club, sources have told ESPN FC.
The Istanbul-based outfit are desperate to sign a striker over the transfer window and the Mexico star is among the players being targeted.
Reports in Turkey had claimed Besiktas wanted to terminate Loris Karius' loan, but ESPN sources have confirmed this is not the case.
Real Madrid go into Sunday's Clasico at Barcelona with Julen Lopetegui under increasing pressure.
Liverpool keeper Loris Karius, on loan at Beiktas, was beaten by a deflected cross against Malmo and faced heavy criticism on social media.
Loris Karius said it took him nearly two weeks to get over the Champions League final defeat and that he was never told he had to leave Liverpool.
Portugal defender Pepe said he was thrilled to be able to score after winning his 100th cap in the 1-1 draw against Croatia on Thursday.
On-loan Liverpool goalkeeper Loris Karius conceded a late equaliser in his first appearance for Besikstas, a 1-1 draw against Bursaspor on Sunday.
The German was unveiled as a Besiktas player on Wednesday, having joined the Turkish side on a two-year loan deal that could become permanent.
Besiktas have completed the signing Loris Karius on a two-year loan, Liverpool confirmed on Saturday.
Fulham have signed Spanish goalkeeeper Fabricio Agosto Ramirez "Fabri" from Turkish side Besiktas on a three-year contract.
First-choice Besiktas goalkeeper Fabri Agosto Ramirez confirmed he's set to join Premier League side Fulham.
Besiktas are considering a move for Arsenal goalkeeper David Ospina following an offer from Fulham for their No. 1 Fabri, sources have told ESPN FC.
Former Madrid player Guti was reportedly considered as a candidate to fill the vacancy left by Zinedine Zidane's resignation as coach.