Everton confirmed the signing of striker Cenk Tosun from Turkish side Besiktas on Friday evening.
Tosun has been in excellent form for Besiktas this season and he has been linked to Everton for some time.
Everton manager Sam Allardyce had speculated that the deal, believed to be worth £27 million, could be completed in time to allow him to be on the bench for the Merseyside derby.
As it turned out it wasn't and instead he was confirmed during half-time of the match.
The forward has signed a four-and-a-half year contract.
"It feels great to be an Everton player,” Tosun told the club's website.
"I’m really happy to be here and happy that everything is done. I’m really excited to play for Everton as soon as possible. Everton is a great club with a big history and a big culture and I’m looking forward to showing the fans the kind of player I am."
"I bring my skills here and everybody is going to see what kind of player I am," he continued. "I believe I can be a good player in the Premier League for Everton. The Premier League is a strong league, I know that, so my own physical strength will help me.
"Also I can use both feet the same and I believe I am a good striker in the box. I’m really looking forward to training with my team-mates and getting to know them and, of course, I want to play as soon as possible. The Tottenham game will be the first game I am available for and I’m very excited about it already.
"I’m really excited to work with my new team-mates because Everton has really, really big names, big players. I’m excited to play with them and to learn from them as well, players like Wayne Rooney and the very good creative players we have here, too.
"They can help me score goals. I know the guys as I’ve always watched Everton’s games from Turkey, so I know a bit about the team already. I hope they can make a lot of assists for me!”