Women's defending champion Emily Whitlock, from England, eased into the last four following an 11-4, 11-5, 11-3 win over Finland's Emilia Soini in the 18-year-old from Colwyn Bay's third straight games win in the championship.
There was an upset in the other half of the draw where Germany's Caroline Sayegh defeated Nele Gilis, a 3/4 seed from Belgium, 12-10, 11-8, 13-11.
Declan James, the top seed in the men's event, is also from England. But the 18-year-old from Nottingham was extended to five games in the third round before overcoming Israeli Daniel Poleshchuk - then had to fight back from a game down in the quarter-finals to beat local hero Rui Soares, a 9/16 seed from Portugal, 9-11, 11-4, 11-8, 11-7.
Hopes of the predicted all-English men's final were dashed when Portugal's Claudio Pinto upset Oliver Holland, the No2 seed from England, 11-4, 11-7, 11-7 in the third round.
But Frenchman Damien Volland put paid to the 16-year-old's bid to provide unexpected local interest in the last four when the 5/8 seed defeated Pinto 11-9, 8-11, 11-4, 8-11, 11-8 in the next round.

RESULTS: European Junior U19 Championship, Oporto, Portugal

Men's 1st round:
[17/32] Michael Craig (IRL) bt Diogo Paiva (POR) 11-2, 11-2, 11-5
[17/32] Remo Handl (SUI) bt Niels van Leeuwen (NED) 11-4, 11-6, 11-1
[9/16] Daniel Poleshchuk (ISR) bt Pedro Pinto (POR) 11-7, 11-5, 11-2
[17/32] Sean Conroy (IRL) bt Felix Auer (GER) 11-7, 11-9, 11-6
[17/32] Andre Ergenz (GER) bt Tomas Silva (POR) 11-9, 11-0, 11-4
[17/32] Michael Shpakov (SUI) bt Anders Rost (NOR) 11-6, 11-6, 11-5
[17/32] Jaakko Vahamaa (FIN) bt Jorge Pimentel (POR) 11-0, 11-5, 11-2
[9/16] Alexandre Cogno (FRA) bt Jan Ryba (CZE) 11-5, 11-4, 11-8
[9/16] Aitor Zunzunegui (ESP) bt Silvio Soom (SUI) 11-3, 11-8, 11-3
[17/32] Roshan Bharos (NED) bt Trym Akerstrom Aasness (NOR) 11-5, 11-5, 11-7
Owain Taylor (WAL) bt [17/32] Florian Mader (AUT) 11-8, 6-11, 11-4, 11-3
Kristian Rautiainen (FIN) bt [17/32] Tom Lucas (NED) 11-7, 11-8, 11-8
[17/32] Baptiste Masotti (FRA) bt Nick Kuys (NED) 11-6, 11-1, 11-9
[9/16] Jordan Davies (WAL) bt Conor Lavin (IRL) 11-2, 11-6, 10-12, 11-3
[9/16] Sven Lemmermann (GER) bt Jorge Monteiro (POR) 11-1, 11-1, 11-1
[17/32] Yannick Lindemann (SUI) bt Hakon Standal (NOR) 11-6, 12-10, 11-1
[17/32] Auguste Dussourd (FRA) bt Robert Luke (WAL) 12-10, 11-4, 11-7
Toon van Baekel (BEL) bt [17/32] Robin Gadola (SUI) w/o
[17/32] Jakub Solnicky (CZE) bt Alfonso Silva (POR) 11-6, 11-9, 13-11
[9/16] Claudio Pinto (POR) bt Victor Manuel Reguera (ESP) 11-6, 11-7, 11-4
Joel Makin (WAL) bt [17/32] Roee Avraham (ISR) 11-9, 11-8, 11-6
[17/32] Paul Mairinger (AUT) bt Edmon Lopez (ESP) 11-7, 8-11, 11-8, 11-1

2nd round:
[1] Declan James (ENG) bt [17/32] Michael Craig (IRL) 14-12, 11-3, 11-3
[9/16] Daniel Poleshchuk (ISR) bt [17/32] Remo Handl (SUI) 11-5, 11-5, 11-4
[9/16] Rui Soares (POR) bt [17/32] Sean Conroy (IRL) 12-10, 11-8, 11-6
[17/32] Andre Ergenz (GER) bt [5/8] Ashley Davies (ENG) w/o
[5/8] Jan van den Herrewegen (BEL) bt [17/32] Michael Shpakov (SUI) 11-2, 11-3, 13-11
[9/16] Alexandre Cogno (FRA) bt [17/32] Jaakko Vahamaa (FIN) 11-6, 11-6, 13-11
[9/16] Aitor Zunzunegui (ESP) bt [17/32] Roshan Bharos (NED) 11-7, 13-15, 11-2, 11-5
[3/4] Tom de Mulder (BEL) bt Owain Taylor (WAL) 11-6, 11-6, 11-4
[3/4] Tom Ford (ENG) bt Kristian Rautiainen (FIN) 11-5, 11-7, 11-4
[9/16] Jordan Davies (WAL) bt [17/32] Baptiste Masotti (FRA) 12-14, 11-4, 11-13, 11-8, 11-8
[9/16] Sven Lemmermann (GER) bt [17/32] Yannick Lindemann (SUI) 6-11, 11-6, 8-11, 11-7, 11-9
[5/8] Richie Fallows (ENG) bt [17/32] Auguste Dussourd (FRA) 11-6, 12-10, 11-7
[5/8] Damien Volland (FRA) bt Toon van Baekel (BEL) 11-3, 11-1, 11-0
[9/16] Martin Svec (CZE) bt [17/32] Jakub Solnicky (CZE) 11-8, 4-11, 8-11, 11-8, 11-9
[9/16] Claudio Pinto (POR) bt Joel Makin (WAL) 6-11, 11-8, 11-4, 11-8
[2] Oliver Holland (ENG) bt [17/32] Paul Mairinger (AUT) 13-11, 13-11, 11-4

3rd round:
[1] Declan James (ENG) bt [9/16] Daniel Poleshchuk (ISR) 9-11, 14-12, 11-8, 7-11, 11-4
[9/16] Rui Soares (POR) bt [17/32] Andre Ergenz (GER) 11-8, 12-10, 11-7
[5/8] Jan van den Herrewegen (BEL) bt [9/16] Alexandre Cogno (FRA) 8-11, 11-6, 12-10, 11-5
[3/4] Tom de Mulder (BEL) bt [9/16] Aitor Zunzunegui (ESP) 11-5, 11-3, 11-3
[3/4] Tom Ford (ENG) bt [9/16] Jordan Davies (WAL) 11-4, 11-9, 11-5
[5/8] Richie Fallows (ENG) bt [9/16] Sven Lemmermann (GER) 14-12, 11-5, 10-12, 11-5
[5/8] Damien Volland (FRA) bt [9/16] Martin Svec (CZE) 4-11, 11-8, 11-6, 11-3
[9/16] Claudio Pinto (POR) bt [2] Oliver Holland (ENG) 11-4, 11-7, 11-7

Quarter-finals:
[1] Declan James (ENG) bt [9/16] Rui Soares (POR) 9-11, 11-4, 11-8, 11-7
[5/8] Jan van den Herrewegen (BEL) bt [3/4] Tom de Mulder (BEL) 12-10, 8-11, 11-8, 4-11, 11-8
[3/4] Tom Ford (ENG) bt [5/8] Richie Fallows (ENG) 11-6, 7-11, 12-14, 11-6, 11-3
[5/8] Damien Volland (FRA) bt [9/16] Claudio Pinto (POR) 11-9, 8-11, 11-4, 8-11, 11-8

Women's 1st round:
[17/32] Nikki van der Heijden (NED) bt Catarina Sousa (POR) 11-2, 11-3, 11-2
[17/32] Alvilde Sonju (NOR) bt Alexandra Santos (POR) 11-3, 11-4, 11-4
[17/32] Catuxa Codesido (ESP) bt Laura Lagerweij (NED) 11-3, 11-0, 11-0
[17/32] Anete Sokko (EST) bt Sara Neves (POR) 11-7, 11-7, 11-6
[17/32] Sarah Clode (WAL) bt Brenda Nieuwenhuis (NED) 11-8, 8-11, 11-5, 11-3
[17/32] Milena Penkov (SUI) bt Jacqueline Peychaer (AUT) 11-9, 11-5, 9-11, 16-14
Sara Esperon (ESP) bt [17/32] Komi Reele (EST) 2-11, 11-8, 13-11, 11-9
Marina de Juan (ESP) bt [17/32] Barbora Krejcova (CZE) 11-4, 11-8, 11-4

2nd round:
[1] Emily Whitlock (ENG) bt [17/32] Nikki van der Heijden (NED) 11-1, 11-3, 11-4
[9/16] Camille Lanier (POR) bt [17/32] Christina Gomez (ESP) 13-11, 11-7, 11-6
[9/16] Emilia Soini (FIN) bt [17/32] Jennifer Haley (WAL) 11-3, 11-6, 11-3
[5/8] Enora Villard (FRA) bt [17/32] Alvilde Sonju (NOR) 11-9, 11-1, 11-1
[5/8] Victoria Temple Murray (ENG) bt [17/32] Catuxa Codesido (ESP) 12-10, 11-3, 11-6
[17/32] Tereza Svobodova (CZE) bt [9/16] Fiona Murphy (WAL) 11-9, 11-9, 3-11, 12-10
[9/16] Annika Wiese (GER) bt [17/32] Cindy Merlo (SUI) 11-9, 11-2, 11-3
[3/4] Melissa Alves (FRA) bt [17/32] Anete Sokko (EST) 11-2, 11-2, 11-2
[3/4] Nele Gilis (BEL) bt [17/32] Sarah Clode (WAL) 11-0, 11-6, 11-7
[17/32] Marie Stephan (FRA) bt [9/16] Anna Kimberley (ENG) 11-3, 14-16, 11-5, 11-6
[9/16] Kristina Alexova (CZE) bt [17/32] Nikita Brant (BEL) 11-8, 11-3, 11-0
[5/8] Caroline Sayegh (GER) bt [17/32] Milena Penkov (SUI) 11-7, 11-6, 11-5
[5/8] Tessa ter Sluis (NED) bt Sara Esperon (ESP) 9-11, 11-2, 11-7, 11-5
[9/16] Eleanor Lake (ENG) bt [17/32] Karolina Holinkova (CZE) 12-10, 11-6, 5-11, 11-9
[17/32] Csenge Kiss-Mate (HUN) bt [9/16] Denisa Peleskova (CZE) 11-4, 11-7, 11-4
[2] Julia Lecoq (FRA) bt Marina de Juan (ESP) 11-4, 11-7, 11-4

3rd round:
[1] Emily Whitlock (ENG) bt [9/16] Camille Lanier (POR) 11-6, 11-4, 11-3
[9/16] Emilia Soini (FIN) bt [5/8] Enora Villard (FRA) 11-5, 11-8, 11-4
[5/8] Victoria Temple Murray (ENG) bt [17/32] Tereza Svobodova (CZE) 11-7, 11-5, 11-13, 13-15, 11-9
[3/4] Melissa Alves (FRA) bt [9/16] Annika Wiese (GER) 11-9, 11-3, 8-11, 11-2
[3/4] Nele Gilis (BEL) bt [17/32] Marie Stephan (FRA) 11-2, 11-0, 11-6
[5/8] Caroline Sayegh (GER) bt [9/16] Kristina Alexova (CZE) 11-4, 11-8, 12-10
[9/16] Eleanor Lake (ENG) bt [5/8] Tessa ter Sluis (NED) 11-6, 11-9, 6-11, 11-6
[2] Julia Lecoq (FRA) bt [17/32] Csenge Kiss-Mate (HUN) 11-5, 8-11, 11-8, 11-7

Quarter-finals:
[1] Emily Whitlock (ENG) bt [9/16] Emilia Soini (FIN) 11-4, 11-5, 11-3
[3/4] Melissa Alves (FRA) bt [5/8] Victoria Temple Murray (ENG) 11-4, 7-11, 12-10, 11-6
[5/8] Caroline Sayegh (GER) bt [3/4] Nele Gilis (BEL) 12-10, 11-8, 13-11
[2] Julia Lecoq (FRA) bt [9/16] Eleanor Lake (ENG) 11-7, 11-7, 11-3

Men's semi-final line-up:
[1] Declan James (ENG) v [5/8] Jan van den Herrewegen (BEL)
[5/8] Damien Volland (FRA) v [3/4] Tom Ford (ENG)
Women's semi-final line-up:
[1] Emily Whitlock (ENG) v [3/4] Melissa Alves (FRA)
[2] Julia Lecoq (FRA) v [5/8] Caroline Sayegh (GER)