Northampton pulled seven points clear of third-placed Bath in the Aviva Premiership table after securing an edgy 36-21 win over London Irish at Franklin's Gardens.
Aviva Premiership leaders Saracens claimed a 23-18 victory over Newcastle at Kingston Park with the home side snatching a vital bonus point in their battle against relegation.
Sale kept a grip on sixth place in the Aviva Premiership and guaranteed a place in the European Rugby Champions Cup for next season with a 55-12 victory over Exeter at Sandy Park.
Bath left it until the 77th minute to claim the four-try bonus point that lifts them back into third place in the Aviva Premiership as they overcame Worcester at the Rec.
Round 20 is the round that no-one can afford to lose... it is a weekend filled with huge Aviva Premiership clashes that mean absolutely everything to the teams involved.
Mike Brown's decisive try continued Harlequins' late charge for a place in the Aviva Premiership play-offs and ended Leicester's seven-match winning league run.
Northampton Saints flanker Tom Wood says it would be 'criminal' if his side were to tail off now and lose their spot in the top two of the Aviva Premiership table.
Responding to their demands for £14 million compensation, Rugby Football Union chief executive Ian Ritchie says that Aviva Premiership clubs will benefit from the 2015 World Cup.
Gloucester pair Tavis Knoyle and Sila Puafisi will appear before a disciplinary hearing in London this Wednesday after being sent off against Bath at the weekend.
Gloucester have identified the individual that threw a plastic bottle towards referee Tim Wigglesworth during Saturday's Aviva Premiership clash with Bath at Kingsholm.
Reigning Aviva Premiership champions Leicester put four tries on Wasps to keep up the pressure on second-placed Northampton with a 27-15 win at Welford Road.
Centre Vereneki Goneva has spurned the advances of Castres and decided to stay with Aviva Premiership champions Leicester Tigers, signing a new contract.