Saracens will have to learn the lessons from their lack of discipline in South Africa as they look to get back to winning ways in the Investec Champions Cup. 

The three-time winners came away from a trip to South Africa with no points after a 27-16 defeat to the Bulls. 

During the game, they picked up two yellow cards in the first half for Alex Goode and Maro Itoje, before Billy Vunipola saw red in the second half. 

The England No.8 will now face a disciplinary hearing to decide his fate but director of rugby Mark McCall knows that his team need to be better when they are under pressure. 

He said: "I think the discipline comes from pressure. When you are losing collisions and under pressure then sometimes that lack of discipline happens. 

"I thought Alex Goode was unlucky to be honest, I didn't agree with that decision, Billy was trying to be urgent and clear out from a line-out and got it wrong. These things happen sometimes. 

"I'm pleased we fought back hard in the second half but disappointed with the first half." 

Despite that opening defeat, Saracens are still very much in the hunt for a place in the last 16, but cannot afford another slip-up this week. 

They will play host to Connacht at StoneX Stadium, looking to avoid a third loss in a row in all competitions, having been beaten at home by Northampton Saints in league action the previous week. 

Connacht were also beaten in their opening fixture, falling to a 41-5 defeat to Bordeaux-Bègles.