Alexander Isak faces two months on the sidelines after fracturing his leg in a "reckless challenge" from Tottenham's Micky van de Ven, Liverpool boss Arne Slot said Tuesday.

Liverpool striker Alexander Isak faces a lengthy spell on the sidelines after the Premier League champions revealed he had surgery on an ankle injury that includes a fibula fracture on Monday.

Liverpool are awaiting scan results they fear will confirm record signing Alexander Isak has suffered a broken leg after he was injured in their win against Tottenham, reports said Monday.

Alexander Isak endured a bittersweet evening as the Liverpool striker scored before limping off injured in a chaotic 2-1 win over nine-man Tottenham on Saturday.

Isak had failed to score in his five top-flight appearances since making a British record £125 million ($165 million) move from Newcastle in September.

Virgil van Dijk said Liverpool's players are letting manager Arne Slot down after the Premier League champions' collapse continued with a 3-0 home defeat to Nottingham Forest.

Liverpool manager Arne Slot said his side must not make a habit of losing games they should win after six defeats in their last seven games plunged the Premier League champions into crisis.

Here is a look at how eight of them have fared so far.

Brazilian teenager Estevao scored a 95th minute winner as Chelsea inflicted a third consecutive defeat on Liverpool with a 2-1 win at Stamford Bridge on Saturday.

Alexander Isak scored his first Liverpool goal to inspire a 2-1 win against Southampton in the League Cup third round, while Chelsea survived a scare to beat third-tier Lincoln on Tuesday.

Manager Eddie Howe said Newcastle United are still adapting to life without Alexander Isak following the striker's transfer to Liverpool and called for patience as his new-look attack struggles to click into gear.

The opening matchday of the Champions League group-stage continues on Wednesday with a mouth-watering set of fixtures. Reigning champions PSG begin their title defence, Liverpool face familiar foes in Atletico Madrid, Chelsea revisit old memories in Munich, and last season’s finalists Inter travel to Amsterdam for a historic clash with Ajax. Early in the evening, Olympiacos host Pafos, while Slavia Praha take on Bodo/Glimt. 

Mohamed Salah scored a last-gasp penalty against Burnley on Sunday as Liverpool maintained their perfect record to climb back to the top of the Premier League.

Alexander Isak is not in Liverpool's squad for their Premier League match at Burnley on Sunday.

Pep Guardiola said Erling Haaland is "a little bit above" Alexander Isak as the Manchester City boss responded to Arne Slot's claim that Liverpool's new signing was "maybe the best striker in the world".

Liverpool striker Hugo Ekitike has welcomed the arrival of British record signing Alexander Isak and says he is excited about the challenge of competing for a place in the line-up with the Swedish forward.

Alexander Isak says he will be "forever grateful" to former club Newcastle following his British-record £125 million ($167 million) switch to Liverpool on transfer deadline day.

The Sweden striker is understood to have arrived at the club's training ground on Monday, with a protracted saga nearing an end.

Premier League champions Liverpool have agreed a deal to sign Alexander Isak from Newcastle United for a British record transfer fee, media reports said Monday.

Newcastle United's owners will not leave the Premier League club without a recognised striker if the protracted transfer saga involving Alexander Isak ends in the Swede's exit, manager Eddie Howe said ahead of a league meeting with Liverpool.