Driver: Daniil KvyatCar: RB11Laps: 64Best time: 1:23.975Circuit length: 4.428kmFastest Lap: K. Raikkonen (1:20.841)Following a slow start this morning at the Circuito de Jerez, Daniil Kvyat brought the fourth and final day of Infiniti Red Bull Racing’s first pre-season test to a close by posting a solid 64 laps.An issue with the RB11’s Energy Recovery System soon after the start of the session saw the team restricted to the garage until shortly before lunchtime but once back on track the car ran without fault for the rest of the session.“We had an issue this morning but we managed to overcome that and we had a clean run in the afternoon, so I’m really happy to have got a lot of laps under my belt today,” said Daniil. “All in all, I think it was a very productive day, with a lot of positives. I think we know where we are and where we want to be for the next test in Barcelona. We’ve made good progress this week and hopefully there’s more to come.”Head of Race Engineering Guillaume Rocquelin commented: “A slightly frustrating morning for us, with an ERS problem. It cost us a few hours, but to be honest the track was a bit greasy again this morning so we probably didn’t lose too much meaningful running. Once we’d sorted the issue the car ran perfectly all afternoon and we were able to get through the key elements of the programme we had mapped out. This week has all been about establishing reliability and while we’ve had a few niggles the car is pretty much where we want it to be. We focused on medium and long runs all week and Dany was able to do more of that work this afternoon. We did lose track time over the four days and that’s always frustrating, as you inevitably have to scratch some things off the ‘to do’ list, but the major items were covered so I would say we’re leaving Jerez in pretty decent shape.”