Newcastle kept their Champions Cup dream alive with a late 16-14 victory over Worcester at Kingston Park.
Leicester Tigers boosted their chances of an Aviva Premiership play-off spot with a bonus-point win at home to Newcastle.
Fly-half Joel Hodgson kicked a last-gasp penalty as Newcastle Falcons snatched a 16-14 victory at home to Gloucester.
Team news for Friday's Aviva Premiership action as Sale host Worcester and the Falcons take on Gloucester.
Bilbao and Newcastle will be the venues for a major finals weekend in 2018 and 2019 respectively.
Harlequins clicked through the gears at The Stoop to comprehensively beat Newcastle Falcons 53-17 in the Aviva Premiership.
Newcastle Falcons have signed Lyon prop Sami Mavinga and Jersey Reds flanker Gary Graham for next season.
Saracens kept in touch with Premiership leaders Wasps with a 35-27 victory over Newcastle.
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