Klopp's Next Key Signing for Liverpool after Klavan

So far, Liverpool manager Jurgen Klopp has adequately reinforced his squad in the summer transfer window by signing key players.
Belgian international Simon Mignolet was inconsistent for the Reds last season and Klopp has solved that dilemma by signing a new goalkeeper in the form of Loris Karius.
As far as the attacking midfield is concerned, Liverpool have signed a top playmaker in the form of Sadio Mane.
The Merseysiders were shaky at the back in the last campaign and the former Borurssia Dortmund boss has lured two defenders by hiring two center halves Joel Matip and Ragnar Klavan to strengthen his defense.
The question is, who will be Klopp’s next key signing for Liverpool?
At the moment, the Reds are looking to reinforce their midfield department and a few quality names have been linked.
The Reds are close to signing Georginio Wijnaldum from Newcastle United and the Dutch international will be the perfect signing for Klopp.
Wijnaldum is mainly an attacking midfielder but he can effectively play anywhere in the midfield. In his debut Premier League season, the Netherlands star was brilliant for the Magpies.