WATCH the EFL Championship LIVE on beIN SPORTS | Sign up to take advantage of our 7-day FREE TRIAL here | AU | NZ

The Foxes had their second straight relegation confirmed in midweek – they will play in England's third tier next season just 10 years after having won the Premier League.

That meant Souttar's 16-month lay-off from an achilles injury was ended with mixed emotions, but he was all smiles after he put home a characteristically towering header in 12 minutes from time to put the hosts into an unlikely lead.

However, Millwall stole a point late on when Macauley Langstaff fired home in the first minute of stoppage-time, earning the Lions a vital point that moved them back into the second automatic promotion spot on 80 points, one point clear of Ipswish Town ahead of its game against West Bromwich Albion.

Ipswich also has a game in hand on the London side, however, and the draw was certainly less than Alex Neil's men had hoped for at King Power Stadium.

But they had little to show for their efforts in a first half marred by an injury to striker Josh Coburn, who had to leave the field after being hurt by a strong tackled from Hamza Choudhury early in the match.

Souttar was also lucky not to have been punished after his elbow left Coburn's replacement, Mihailo Ivanovic, with a bloody nose, but with no video assistant referee in the EFL, the Socceroos defender was arguably lucky to escape without even a yellow card.

The first half ended goalless after few chances for either side, and the second was going much the same way until Souttar rose high above Millwall left back Zak Sturge to nod home a cross from Luke Thomas and put the hosts into the lead.

But the goal stirred the visitors into gear, and Langstaff scored late to grab a point that could yet prove vital in the Lions' bid for a place in the top flight that it hasn't had for more than 30 years.

Neil conceded he was unsure if the draw would be enough for Millwall to be automatically promoted to the Premier League, but believes his side still has a chance.

"It'll be proven over the next few days whether a point is enough," Neil said.

"I couldn't ask any more from the players but we had chances before they scored.

"We pushed and we pushed, even after we scored - I certainly can't fault the players, the lads that started were excellent and those that came on were excellent.

"Games are decided by moments – it got bundled in at the back stick and we just need to get a flick on it and get it out of the way but then we showed the character to get the goal and try to go on and score the winner.

"If Ipswich go and do what they need to then we'll take stock at that point but as far as I'm concerned, we've had an unbelievable season and we're not writing anything off."