Postpublished at 14:56 British Summer Time 5 April 2015
Wasps:, external Congratulations to Saracens on qualifying for the semi finals of the Champions Cup!
Saracens only English team in Champions Cup last four
Toulon 32-18 Wasps FT
Helu scores twice as defiant Wasps lose to champions
Racing Metro 11-12 Saracens FT
Bosch sends Saracens through with last-gasp kick
Bath and Northampton both lost in last eight on Saturday
Mike Henson and Neil Johnston
Wasps:, external Congratulations to Saracens on qualifying for the semi finals of the Champions Cup!
Saracens' Marcelo Bosch speaking to BT Sport: "I didn't want to force my kick, because it would not go so well. I just tried to feel as relaxed as I could. My kicking coach tells me to imagine I am on the beach and that is what I did."
Paul Grayson
Former England fly-half on BBC Radio 5 live
"Saracens rode their luck today. There's a possible 14 Racing points that never made it on the scoreboard. But Saracens stuck in and Racing never got away on the scoreboard."
Clermont were in the same pool as Saracens and won 18-6 in France.
They have lost only once at home all season and put 26 points on Racing, 46 points on Stade Francais, 18 points on Toulouse.
In short, it will be a different game from last season's 46-6 landslide for Saracens at Twickenham in the semi-finals.
Paul Grayson
Former England fly-half on BBC Radio 5 live
"Can you believe that? We said Saracens needed to take every point available. They haven't done that, they've survived on scraps. In the end a colossal error by Metro and Marcelo Bosch was as cool as you like into the teeth of a gale. He kicked it as though it was his last kick in practice."
It was not the most entertaining game, but you cannot beat that for a finish.
Saracens' travelling contingent are on the pitch to congratulate their team. They will travel away to play Clermont in the last four - a team they beat at home in last year's semi-finals.
Hero. In a plot straight from the Hollywood script scrap-pile, Marcelo Bosch lands a monster - with space to spare - to book Saracens a place in the last four. Saracens mob the match-winning Argentine.
Penalty to Saracens! Marcelo Bosch to step up. This is all-or-nothing, death-or-glory from the Racing 10m line and a slight angle.
Racing Metro take an age over the set-piece. It is another minutes chewed off the clock by the time Maxine Machenaud finally spins it away from the base...
Paul Grayson
Former England fly-half on BBC Radio 5 live
"Saracens may not get more than one more chance now."
A forward pass from Chris Wyles to Marcelo Bosch in the centres. A basic error and it is Racing Metro with the ball and only two minutes to juice out of the clock.
Maxime Machenaud almost away from Chris Ashton at one end, Maro Itoje charges up into the Metro 22m at the other.
Both defences stretched but no knockout blow registered. Play is back up on halfway and crucially Saracens are throwing into the line-out.
Mike Phillips on for Metro at scrum-half.
Paul Grayson
Former England fly-half on BBC Radio 5 live
"Racing look absolutely exhausted. Saracens too are not able to get numbers around the corners. You just felt Saracens were starting to get on top but unfortunately there was a knock on."
Turnover. Racing Metro steam into a breakdown on their own 10m line and referee Nigel Owens decides they have down enough and awards the scrum their way.
Saracens are walking the tightrope here. Neil de Kock drops a kick - but the ball falls backwards. David Strettle juggles - but hangs on in the tackle. They still have the ball and only have a few spells of possession left to score the three points they need.
Paul Grayson
Former England fly-half on BBC Radio 5 live
"Saracens have to look after the ball when they get in the opposition half. They need a period of sustained pressure to enforce a mistake."
The scrum heads south, Nigel Owens blows up, Maxine Machenaud steps up and suddenly it is Saracens who are playing catch-up rugby.
Ten minutes left and Charlie Hodgson might need to warm up that drop-goal routine.
Some horribly crossed wires in the Saracens line-out.
Schalk Brits strolls back in off the touchline to get a repeat of the call, but his fellow forwards have already started their lifting routine. He panics and lobs the ball in before he is back on the oche.
Scrum Metro.
Paul Grayson
Former England fly-half on BBC Radio 5 live
"The pressure is on Racing not to come up with an error. Throughout the game they have not been able to go three, four or five phases without making a mistake."