According to Flashscore, who provide the best betting sites, Waddle said: "I think Newcastle obviously have gone about their business nicely at the moment. They've had a couple of additions that are good players.
"Obviously players leave and they're moving forward, but to see Liverpool in for Alexander Isak is obviously very disappointing because we know that he's a top player. He's a very important player to the way Newcastle play and if they're going to get success they need him up front. You can see why Liverpool obviously are interested. I think they'd like to get Darwin Nunez moved on and bring a new number nine in.
"Isak is very quiet, he never really comes out and does any interviews, never really talks about his life, his future. So for Newcastle, I'm sure the fans in particular would love him to come forward and answer a few questions. I'm sure Isak has got a lot of love for Newcastle United, but as I said, football is a short term business. Opportunities don't come around like the offer he’s got at the minute very often.
"So yes, I'm sure he's had his head turned slightly. He doesn't seem to do any interviews and it would be nice just before the season starts to say, ‘I'm staying at Newcastle and I'm just going to play out this season, enjoy it and we'll see where it takes me from there’. I think just a simple statement would then stop all the speculation about him.”