Besiktas goalkeeper Loris Karius has praised the improvement of the defence at parent club Liverpool.
Adrian has made 10 appearances this term as Alisson recovers from the calf injury he sustained in the win over Norwich in the opening game of the Premier League season.
"Every goalkeeper would feel comfortable behind that defence but Adrian is doing a good job," Karius told the Daily Mail. "He seems like a nice guy; I am happy he is getting game time.
"The defence has improved brilliantly over the last season and a bit and they rarely concede goals anymore. It was solid even back then but now it's on another level because the whole has team improved.
"The longer people are together the better it works. They have been playing together quite a bit and with the potential they have it looks really promising.
"I hope they can win the league. The season is so long but it's always good to have a good start and get some points ahead so it looks good. I can't see them losing a game."
