Sauber: We had some downtime due to small mechanical problems 20 February, 2013 Nico Hulkenberg Nico spent quite a bit of the morning session with aero evaluations. Later in the morning and in the afternoon the main focus was on set-up and tyre work. He completed 88 laps. Tom McCullough, Head of Track Engineering : “Today we tested some new aero and mechanical components and were also working again on the Hard and Medium tyre compounds. Even though we had some downtime due to small mechanical problems, we achieved the majority of our testing plan including many pit stop simulations in the afternoon.” Nico Hülkenberg: “We got a lot done, but also had some issues today. I did quite a lot of running, but it was difficult because the tyres degraded quite quickly. In addition, it was not easy for us today to use the full potential of the tyres on a single quick lap. There is definitely room for improvement.” What comes next: Tomorrow, Nico Hülkenberg will continue driving, while Esteban will be back at the wheel on Friday. Content on GrandPrix247.com by: staff & contributors, Reuters syndication, GMM service, Getty Images, Formula 1 teams, sponsors & organisations.