Reports on Wednesday emerged that Eredivisie champions Ajax and Premier League giants Chelsea reached a verbal agreement on a €45million (£38m) transfer for Ziyech.
Ziyech came off the bench during Wednesday’s 3-0 KNVB Beker victory at Vitesse and Ten Hag provided an update on the 26-year-old Morocco international.
“Ziyech to Chelsea? A transfer was coming, we expected it to happen. I actually already expected this one or two years earlier but each time it was: ‘Wow, he stayed again” Ten Hag told Fox Sports post-game.
“We are just happy that we will still have him until the end of the season.”
Ziyech has been directly involved in 166 goals since his Eredivisie debut in 2012-13, contributing 79 goals and 87 assists.
Since joining Ajax from Twente in 2016, Ziyech has scored 38 league goals and 48 across all competitions.
Ziyech’s sensational tally of 51 Eredivisie assists from the beginning of the 2016-17 campaign is 16 better than the 35 of Steven Berghuis, the next highest during that period, while his 421 chances created since September 2016 is a whopping 134 more than his nearest rival.
Ten Hag added: “I am not surprised by the news about Ziyech. I know that our players are very popular with the big clubs in Europe. That is just great.
“Chelsea are a fantastic club. When it is final, I am very happy for Hakim, and I am very proud of him.”