ALEXANDER ISAK is training alone at his former club after telling Newcastle he wants to leave.The Swedish ace, 25, informed the Magpies of his desire to quit last week, with Liverpool the frontrunners to land him.GettyAlexander Isak is training alone at former club Real Sociedad amid speculation over his Newcastle future[/caption]But Toon are understood to be aware of the Swede’s locationGettyIsak did not travel to Singapore with the rest of the Toon squad to focus on his recovery following a minor thigh injury.But the striker has since been seen training alone at the club that sold him to Newcastle, Real Sociedad.Reports in Spain revealed Isak was training in the Basque country.However, Sky Sports adds he has not gone AWOL as Newcastle chiefs are aware of his whereabouts.Earlier this week, it was reported Isak had reached a verbal agreement with Liverpool after the Premier League champions offered him a deal to more than double his £130,000-a-week wages on Tyneside.The Anfield outfit have already added Florian Wirtz, Jeremie Frimpong, Milos Kerkez and Hugo Ekitike in deals worth almost £300million.The £65m sale of Colombian winger Luis Diaz to Bayern Munich – combined with a strong PSR position from minimal spending last summer – has given Liverpool chiefs a strong enough base from which to prepare an offer for Isak.It is understood Toon will only sell their star man for a Premier League record deal of £150m.BEST ONLINE CASINOS – TOP SITES IN THE UKHowever, Liverpool believe they can chip the deal down to a more palatable £120m – which would still be a Prem record.Should the two clubs reach an agreement, Newcastle will immediately look to recruit one or two new strikers to replace Isak’s output – 27 goals and six assists in all competitions last season. Real Sociedad would make a tidy sum from any Isak deal thanks to a reported ten per cent sell-on clause which could bank them around £8.5m.Benjamin Sesko was said to be one Newcastle target, but the 22-year-old also interests Manchester United, while the Red Devils’ own Rasmus Hojlund is now under consideration by St James’ Park bosses.Elsewhere, Ollie Watkins could be available for around £40m, while the likes of Chelsea‘s Nicolas Jackson and Brentford‘s Yoane Wissa are also on the market – the latter now being unsettled following a rejected offer by Nottingham Forest.TRANSFER NEWS LIVE – KEEP UP WITH ALL THE LATEST FROM A BUSY SUMMER WINDOW