The superstar striker has not featured this season after a protracted transfer saga that eventually saw him depart Newcastle United for Premier League champion Liverpool in a £125million deal on deadline day.

Isak had to play the role of bystander as Jon Dahl Tomasson's side was twice pegged back in Ljubljana, with Anthony Elanga's 18th-minute opener cancelled out by Sandi Lovric.

Yasin Ayari restored the visitor's lead in the 73rd minute and that looked to be enough until Vipotnik rescued a point in the final minute of normal time, to leave the teams level after their opening Group B game.

Elsewhere, Andrej Kramaric was on target as Croatia could only muster a 1-0 victory over minnow Faroe Islands, for a win that maintains its 100 percent record in Group L.

Croatia still trails group leader Czechia by three points but has two games in hand.

Scotland started its Group C campaign with a creditable 0-0 draw against Denmark in Copenhagen, a result that boosts Steve Clarke's hopes of leading the team to at least a second-placed finish and a play-off spot. Greece is top on three points after thrashing Belarus 5-1.