England U20s make two changes for tomorrow's IRB Junior World Championship semi final against South Africa.
Gloucester Rugby backs Henry Trinder and Charlie Sharples start at centre and wing respectively whilst Shaun Knight and Dave Lewis are named amongst the replacements.
However, Sale Sharks lock James Gaskell takes over from Gloucester's Dan Williams in the second row against South Africa in Tokyo (11am BST).
The only other change to the matchday squad sees wing Jack Cobden replace his Leicester Tigers teammate Greig Tonks on the bench.
Head coach Mark Mapletoft admitted he had some 'tough calls' to make after England's 52-7 win over Samoa in the final Pool B match, particularly among the forwards.
London Irish James Clark starts a second Under 20 game in succession for the first time, while Bath flanker Josh Ovens has pushed hard for inclusion.
"Everybody's had an opportunity to play and we feel that this side is the strongest one we can put out for this game," said Mapletoft.
"James Gaskell comes back and that's hard on Dan Williams, who's done well, but James has had an outstanding season for us."
"There are a number of other tough calls in areas like the back row where Josh Ovens has done well all season."
"James Clark produced a good strong performance on Saturday, scrummed well, out lineout was good and South Africa will be a big threat in the tight.
"It's another tough call but Jamie George sitting on the bench gives us a good option in the second half."
"South Africa will pose us a massive physical challenge and their game is very strong at the moment if you look at the World Cup, the Sevens, Super 14. They've been very successful in age group world cups in the time I've been involved."
"They've got good halfbacks, they're big and strong in the front row, lots of quality and good players. Even at 20-0 down in their last game against France they didn't give up and ended up winning the game comfortably."
"We know we've stepped up and moved through the gears nicely. Now we've got to step up again and move it on another notch and it would be great to be able to do that tomorrow night."
England Under 20
15 Tom Homer (London Irish); 14 George Lowe (Harlequins), 13 Henry Trinder (Gloucester Rugby), 12 Luke Eves (Bristol Rugby), 11 Charlie Sharples (Gloucester Rugby); 10 Rory Clegg (Newcastle Falcons), 9 Ben Youngs (Leicester Tigers); 1 Ben Moon (Exeter Chiefs), 2 James Clark (London Irish), 3 Bob Baker (London Wasps); 4 Graham Kitchener (Worcester Warriors), 5 James Gaskell (Sale Sharks); 6 Courtney Lawes (Northampton Saints), 7 Calum Clark (Leeds Carnegie, captain), 8 Carl Fearns (Sale Sharks)
16 Jamie George (Saracens), 17 Shaun Knight (Gloucester Rugby), 18 Dan Williams (Gloucester Rugby), 19 Josh Ovens (Bath Rugby), 20 Dave Lewis (Gloucester Rugby) , 21 Rob Miller (Newcastle Falcons), 22 Jack Cobden (Leicester Tigers)
Speaking to the local media this week, back row flanker Jacob Rowan said that he is excited for the challenge at the Ricoh Arena this Sunday, and added that the players know the responsibility is theirs to deliver against the league leaders.
Ben Morgan was on media duty this week, and as Gloucester prepare for Sunday's trip to Wasps, the number eight is looking forward to see Gloucester go toe-to-toe with another of the Aviva Premiership's front runners.
Tom Marshall scored his first Gloucester try in the 31-23 win over Saracens on Friday evening and was named Man of the Match. Talking to GRTV, he praised the forwards for setting the tone on the night.
Matt Scott was on media duty this week, and the Scottish international spoke about the benefit of having a full week of training with his club mates and the determination to get back to performing well against Saracens this Friday evening.
Last Friday night saw Gloucester Rugby Head of Community Adam Balding present a cheque for £7082.82 to the Royal British Legion as a result of a series of fundraising during the Remembrance Period in November.
Gloucester battled bravely against Wasps on Sunday, but it was a case of taking chances at the Ricoh Arena. Gloucester didn't make the most of theirs while Wasps did, and that proved to be the difference.
Gloucester were competitive for long periods at the Ricoh Arena on Sunday afternoon, but were left to rue a host of missed scoring opportunities throughout as Wasps hit back to earn a 35-22 Aviva Premiership win.
Gloucester's Ciaran Knight made his first start at tighthead prop, Henry Walker made his first appearance as a second half replacement and Alex Seville also featured as England U20s might it three from three in the U20s Six Nations with a 46-0 win over Italy in Darlington on Friday night.