London: Arsenal have signed Germany's 2014 World Cup-winning defender Shkodran Mustafi and Spanish striker Lucas Perez from La Liga, the Premier League club said on Tuesday.
No financial details were disclosed but British media said the fee for Mustafi was 35 million pounds and Lucas 17 million.
Mustafi has been at Valencia for the past two seasons, while Lucas joined Deportivo La Coruna in August 2015.
Mustafi, the 24-year-old centre-back, who is on international duty, began his career at Everton's academy before moving on to Sampdoria.
"He is at the right age. He has good experience. He is a very focussed player who can play with the ball as well," manager Arsene Wenger told the club's website.
"We have taken a great player."
Lucas netted 19 goals in all competitions for Deportivo last season, including seven in as many games to equal the record of former Brazil striker Bebeto.
The 27-year-old started his career with Atletico Madrid before having spells at Rayo Vallecano, Ukrainian club Karpaty Lviv and Greek outfit PAOK Salonika.
Wenger said the forward would fit in well with Arsenal's possession- based style.
"He's not only a goalscorer, he's a guy who combines well with partners, who can give a final ball and makes good runs, added the Frenchman.
(with agency inputs)

Lucas Perez and Shkodran Mustafi. Twitter/@Arsenal