Johnson caused an upset in the Welsh camp by defeating their top player
Both of Guernsey's badminton players have made it through to the last 16 of the singles competition at the Commonwealth Games in Delhi.
Gayle Lloyd beat Uganda's Daisy Nakalyango 21-10 21-13 in 17 minutes.
And Elena Johnson beat Wales's world number 255 Carissa Turner 25-23 19-21 24-22 in a 50-minute match.
Badminton team manager John Stuart said: "Elena was not expected to win this match, but she played quite probably the best match of her life."
In the last 16 of the ladies singles Johnson faces number two seed Mew Choo Wong of Malaysia, who is ranked 17 in the world, while Lloyd has drawn sixth seed Anna Rice of Canada, who is ranked 42.
Peter Jory, the opening ceremony flag bearer, dropped three places
Stuart said: "These will be incredibly tough matches, but both girls are thoroughly looking forward to the opportunity."
Kylie Robilliard missed out on a place in the 100m hurdles final by 0.11 seconds after placing fourth in her heat with a season's best time.
Guernsey's bowls men's triples team, Garry Collins, Dan De La Mare and Gary Pitschou, lost to Wales in the play-off for a semi-final place.
Day Seven Results - Sunday, 10 October
Women's 100m hurdles - Kylie Robilliard finished fourth in her heat in 13.94 seconds, just 0.11 seconds off the slowest qualifier
Women's 800m - Helen Hadjam finished in two minutes 15.08 seconds in sixth place in her heat
Women's singles round two - Elena Johnson beat Carissa Turner (Wales) 25-23 19-21 24-22
Gayle Lloyd beat Daisy Nakalyango (Uganda) 21-10 21-13
Women's doubles round one - Elena Johnson and Gayle Lloyd won 2-0 against Linda Hammond and Stella Koteika (Ghana) 21-11 21-12
Men's 168km road race - James McLaughlin was 20th in three hours 54 minutes and 11 seconds
Tobyn Horton finished 27th in three hours 55 minutes and 12 seconds
Josh Gosselin was 47th in four hours six minutes and 14 seconds
Women's 112km road race - Ann Bowditch was the last of the finishers in an eventful race in 38th with a time of three hours 8 minutes 44 seconds
Men's triples - Guernsey lost to Wales in a play-off for a semi-final place 6-8 3-12
Men's singles - Matt Le Ber lost to Gary Kelly (Northern Ireland) 5-8 5-6
Women's singles - Alison Merrien lost on a tie-break to Claire Johnston (Scotland) 2-13 10-4 1-2, won a tie-break against Lebogang Mascarenhas (Botswana) 5-8 9-5 5-0 and lost to Carmen Anderson (Norfolk Island) 7-10 8-10
Full bore pairs - After the 500 yards shoot Adam and Peter Jory dropped from third to 11th
Full bore singles - Mixed fortunes during the 500 yards shoot saw Adam Jory move up two places to 19th while Peter Jory dropped three to 28th
Mixed doubles pool matches - Zephanie Curgenven and Henry Birch beat Sharya Guruge and Navin Samarasinghe (Sri Lanka) in straight sets 11-3 11-9
Men's singles pool matches - Garry Dodd beat Joseph Dibbs (Jamaica) 11-9 13-11 8-11 11-7 12-10 and lost to Marios Yiangou (Cyprus) 5-11 5-11 5-11 9-11
Olly Langlois beat Kevin Farley (Barbados) 11-6 11-9 11-6 11-6 and lost to Shane Overmeyer (South Africa) 5-11 1-11 9-11 6-11
Matt Stubbington lost to Mao Sheng Kho (Malaysia) 5-11 10-12 6-11 9-11
Women's singles pool matches - Alice Loveridge lost in a close match that last 31 minutes to Janet Effiom (Nigeria) 11-8 11-8 13-15 11-5 8-11 10-12 6-11
Men's doubles pool matches - Garry Dodd and Olly Langlois beat Canisius Swenhele and Masoud Mtalaso (Tanzania) 11-6 11-6 11-3
Women's doubles pool matches -Alice Loveridge and Dawn Morgan lost to Xue Jie Pang and Mengyu Yu (Singapore) 6-11 7-11 6-11
Mixed doubles pool matches - Garry Dodd andAlice Loveridge beat Masoud Mtalaso and Rose Kikma(Tanzania) 11-1 11-1 11-4 and lost to Zi Yang and Yuegu Wang (Singapore) 3-11 1-11 3-11
Matt Stubbington and Kay Chivers lost to Seun Ajetunmobi and Olaide Atinuke (Nigeria) 5-11 11-13 7-11