Grand slam winner Dylan Alcott has lashed US Open organisers after winning his sixth major title at an indoor practice court after rain forced the final to be moved from Flushing Meadows.

Alcott took the silverware in the men's wheelchair quad division with a 7-5, 6-2 win over American veteran David Wagner in the final.

The Australian three-times Paralympic gold medallist fought back from 3-0 down in the first set to add the 2018 title to his victory at the tournament in 2015.

After the match, Alcott, who has won the past four Australian Open titles, hit out at what he said was organisers' cost cutting, which saw the match moved from the outside courts at Flushing Meadows to an indoor practice facility.

The US Open victory brought Dylan Alcott's grand slam tally to six. ( Supplied: Instagram/Dylan Alcott )

"Obviously the rain came and they scheduled a little poorly. They had a lot of matches to finish so we had to come out to an indoor practice court otherwise we wouldn't have got on, which is a real bummer," he said.

"They could have kept Arthur Ashe or Louis Armstrong open a little bit longer but they chose the cost was too much, which is a real bummer.

"I was in a weird mood all day considering we had to play out here. But I said, 'You know what, I'd be in a worse mood tomorrow if I looked back tomorrow and said you were being a sook'."

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Ranked number two in the world coming into the final, the Victorian broke Wagner's serve six times on his way to a rare grand slam victory outside Australia.

However, while he planned to celebrate with "a few beers", he said the change of venue had affected the final "hugely" and robbed the event of the big-match billing it deserved.

"I'm a big-atmosphere kind of guy. I've got a loud personality and I enjoy firing myself up, and when you're out in the middle of nowhere and you can't even find the court, it's tough," he said.

He said US Open organisers could follow the lead of Australian Open officials, who put the wheelchair events on centre stage.

"We play on Rod Laver Arena in front of 12,000 people," he said.

"People want to watch."