Manchester United fans were naturally fearing the worst when Zlatan Ibrahimovic suffered a nasty looking knee injury against Anderlecht on Thursday.

The 35-year-old landed awkwardly after an aerial challenge with Kara Mbodji in second half stoppage time, hyperextending his right leg.

He received treatment on the pitch but wasn't able to continue, with Anthony Martial coming on as his replacement.

Speaking after the game, Jose Mourinho explained how early news on Ibrahimovic and Marcos Rojo's respective injuries was "fairly negative".

He added, per BBC Sport: "I want to wait but my feeling is not good for both. I want to wait and be optimistic but I am not."

Losing Ibrahimovic for the rest of the season - with what is suspected to be a cruciate ligament injury - would come as a huge blow to United.

Not only are they in the race for the top four, but they're in the semi-finals of the Europa League and face Celta Vigo on May 4 and May 11.

Worse still is the fact Ibrahimovic is United's top goalscorer this season on 28 goals. Without the Swede's experience and power up top, they could really struggle.

Ibrahimovic is due to undergo scans to reveal the true extent of his injury but until then, Luke Shaw has provided a positive and somewhat incredible update.

According to the English left-back, Ibrahimovic is "fine" and that he was walking around the dressing room after the game, despite what happened to his knee.

"He's fine," Shaw said, per the Independent. "He was walking around in the changing room."

Now we all know Ibrahimovic is a machine, but how is that possible? Either he somehow didn't suffer a serious injury, or he just doesn't feel pain. Just look at his knee in the video below.

Kurt Zouma suffered a similarly horrific injury against United in 2016 and was ruled out for seven months with a ruptured anterior cruciate ligament.

But whereas Zouma was stretchered off the pitch, Ibrahimovic was able to limp off and walk around the dressing room shortly after. The guy is indestructible.

Scans could yet reveal the veteran striker has a serious injury, of course, but this is the God of Manchester we're talking about here.