Tennis chaos as stars tumble in staggering Queen's results

The tennis world has reacted to a number of top seeds at Queen's falling early in the ATP draw in the lead up to Wimbledon.

The biggest upset was top seed and French Open finalist Casper Ruud falling to ATP debutant Ryan Penisto.

'SAVAGE': Tennis star Jelena Ostapenko cops backlash over interview

'NO PLANS': Novak Djokovic facing US Open shock after announcement

The British World No.180 pulled off two tiebreakers to defeat Ruud 7-6, 7-6 in the biggest win of his career.

"I can't really believe it, it feels like a dream. I didn't get much sleep last night, it doesn't feel real," the 26-year-old said.

"Obviously Casper is an unreal player, he did so well at the French Open so I knew it was a tough ask, but you have to step on the court knowing you've got a chance to win - so that's what I did.

"It's a bit surreal, four or five years ago I was sitting over there watching. It's a bit unreal. I'll need a bit of time to process it."

And it wasn't the only upset to the top seeds.

American qualifier Sam Querry upset No.5 seed Diego Swartzman 6-1, 6-4.

This follows Grigor Dimitrov knocking out local hope and No.3 seed Cameron Norrie in Round 1.

No.4 seed Taylor Fritz fell to Jack Draper.

Jose Morgado pointed out only three seeds from the Top 8 were left.

Morgado pointed out that US Open winner and veteran Marin Cilic is the only seed left in the top half of the draw and his recent form should suggest he'll make a big push to the final.

Fans were quick to point out that a number of the top seeds that had fallen at Queen's wouldn't consider grass their strongest surface.

Defending champ Mateo Berrettini advances at Queen's

Mateo Berrettini is the defending champion and the big serving Italian was able to defeat Dan Evans 6-3, 6-3.

Tour veteran and three-time grand slam champion Stan Wawrinka survived a two-hour 48-minute marathon against doubles partner Frances Tiafoe.

The 37-year-old Swiss marked a winning return to grass in his first match on the surface since Wimbledon 2019, triumphing 7-6, 6-7, 7-6.

Wawrinka improves his tour-level record this season to 3-3, playing in his fourth event after returning from a foot injury.

"It takes time to be back at my age after more than a year off of the Tour," he said of his progress so far.

"I'm enjoying the atmosphere. I'm enjoying playing in front of fans like today."

The world No.290 will play either sixth seed Denis Shapovalov or Tommy Paul in the next round.

That match was halted due to bad light at one set apiece.

with AAP

Click here to sign up to our newsletter for all the latest and breaking stories from Australia and around the world.