Twice Roland Garros finalist Dominic Thiem believes his first round opponent at Wimbledon Sam Querrey will be a pretty tough player to crack on grass despite beating him in three of their four encounters, writes Ziad Chaudry.

The 25-year-old current world number four from Austria, who has clearly distanced himself as a title contender at SW19, meets the big serving American on Tuesday in their first clash on grass and the hallowed turf of AELTC.

Thiem has beaten Querrey, who reached the last four in 2017 and a beaten finalist at Nature Valley International in Eastbourne last Saturday, on hard and his specialist clay surfaces.

"It was twice on Acapulco (Mexico), once in Vienna (Austria) which are pretty slow hard courts and one match was in Rome on clay so I think grass is Querrey's best surface," said Thiem who will be playing his first match since reaching the Roland Garros final against eventual champion Rafael Nadal in Paris, France last month.

"He's done well at Wimbledon and has also won Queens. He got to the final in Eastbourne so it's a very uncomfortable first round opponent and will be a very tough challenge on Tuesday."

The Austrian finalised his Wimbledon preparations at last week's Aspall's Tennis Classic at Hurlingham Club, near Putney Bridge by beating Frenchman Nicolas Jarry who plays similar to Querrey and admits he feels satisfied.

"I'm feeling good," he admits. "I was here in London since Monday so I had some good practice days. My only match here at Hurlingham was against a big server so I have a similar opponent with Querrey".

Thiem, who last year was forced off injured during his first rounder against Cryprus Marcos Baghdatis, will have to navigate his way through his half of the draw that includes Rafael Nadal, Roger Federer, Nick Kyrgios and Kei Nishikori in order to reach his third Glam Slam Final, which if it happens then will be his first at SW19.

"I have to be very very lucky and many things would have to happen right but I don't think it's going to happen. Many strong opponents in the draw but I will give my best of course.

"Everything is way close together at Wimbledon and on the grass courts so I'm really only looking on my first round and try to win that because I didn't do it last year obviously."