LONDON, Sept. 2 -- European football's summer transfer window was hours away from closing with focus on the Premier League, with Alexander Isak and Gianluigi Donnarumma potentially clinching high-profile moves. A record single-window spend of £2.7 billion by England's top-flight clubs could be supercharged if Liverpool finally secure the signing of Isak before deadline following a summer-long pursuit of the Newcastle striker. Liverpool have reached an agreement with Newcastle to buy Isak for £125 million - which would be a British-record fee - ahead of him taking a medical examination, British media reported. Neither club has officially commented on the potential deal for Isak, who was scheduled to meet up with Sweden's national team later Monday. Liverpool have already spent nearly £300 million in this transfer window....