Newcastle United F.C. have signed midfielder Mikel Merino from Bundesliga side Borussia Dortmund on a season-long loan, the newly promoted Premier League club said on Friday.The Spain under-21 international is manager Rafa Benitez’s fifth signing of the current transfer window following the arrivals of Christian Atsu, Florian Lejeune, Jacob Murphy and Javier Manquillo.”It feels good and I’m very happy to be here, to be part of this club. I’m looking forward to touching the ball, meeting my new team-mates and starting to play football,” Merino told Newcastle’s website (www.nufc.co.uk).?? New signing @mikelmerino1 is already excited about playing in the @premierleague ??º Full interview: https://t.co/PnfHxWxggz #NUFC pic.twitter.com/2BVVjhC0vP- Newcastle United FC (@NUFC) July 28, 2017″I know it’s a great club and a really nice city. I had different options but I think this is the right place for me to play.”Merino, who moved to Dortmund from Spanish side Osasuna at the start of last season, made eight appearances in all competitions for the German club.He also featured for his country in last month’s European under-21 championship in Poland, helping Spain finish as runners-up to Germany.”He’s a good size, has quality on the ball and he’s very, very focused and professional. Hopefully he’s the kind of player we can improve a lot – he certainly has the mentality to get better and better,” Benitez said.