The Bulls took an early lead against the Saints, only for the home team to dig deep and lead 26-10 at half time. Remarkably, Bulls fought back to eventually win 34-30.
Only one match on Saturday, and Harlequins next opponent, Salford City Reds, were hosting Hull FC who had lost their previous six matches in all competitions. Hull FC put an end to this losing streak, winning 18-14 at the Willows, denting Salford's impressive run of form in the process.
On Sunday, bottom of the table Celtic Crusaders were left still chasing a maiden Super League victory after losing 22-34 to Castleford Tigers. Tony Smith's rejuvenated Warrington Wolves side threw up a surprise when they convincingly beat Huddersfield Giants 40-18 at the Halliwell Jones Stadium, whilst Wigan Warriors put the same score past Wakefield Trinity Wildcats to emerge 40-26 victors at Belle Vue.
Finally, Hull KR held on to second place in the engage Super League with another convincing victory against Catalans Dragons, 44-10.
Elsewhere, in the Co-operative Championship 1, London Skolars are still without a win this season after losing 46-8 away at Rochdale.
The results of round 11 mean Harlequins hold on to 7th place in the table, with a game in hand over every team above them. CLICK HERE to see the engage Super League table.
Hull K R 44 v 10 Catalans Dragons
Celtic Crusaders 22 v 34 Castleford
Warrington 40 v 18 Huddersfield
Wakefield 26 v 40 Wigan
Salford 14 v 18 Hull
Leeds 4 v 21 Harlequins RL
St Helens 30 v 34 Bradford