Hull and Swansea earned valuable victories in their battle for English Premier League survival but Middlesbrough slid further towards the drop after a 4-0 hammering at Bournemouth.
Hull's 2-0 win over Stoke City and Swansea's identical scoreline against Watford on Saturday increased the pressure on Crystal Palace and Burnley, who are hovering above the relegation zone and play Liverpool and Manchester United respectively on Sunday.
With four games remaining, 17th-placed Hull are one place above the drop zone with 33 points to the 31 of Swansea.
Boro are in 19th spot on 24 points and Sunderland are bottom on 21.
Hull had a tough task after Oumar Niasse was surprisingly shown a straight red card after 25 minutes for a challenge on M'Baye Niang.