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.
London Irish scrum-half Tomas O'Leary could face a hefty ban after being sent-off for stamping in his side's 23-20 Aviva Premiership victory over Wasps at Adams Park.
Former Cardiff Coach Dai Young believes that the Welsh Rugby Chiefs and the four regional teams will put politics aside and broker a resolution to their bitter feud.
Newcastle ended their try drought but Wasps left Kingston Park the happier side after climbing up the Aviva Premiership table with a 17-12 win at Kingston Park.
Wasps can book their place in the Amlin Challenge Cup quarter-finals with a match to spare if they can beat Bayonne at Stade Jean-Dauger in their showdown on the second weekend of January.
London Wasps, who are still without a win in this year's Aviva Premiership, make the long trip up North on Friday night to face Sale Sharks at the AJ Bell Stadium.
An injury time conversion from Andy Goode came back off the post to deny Wasps their first win of the season, as they went down 16-15 to Harlequins at the weekend.