Formula 1 rookie Esteban Gutierrez has revealed one the reasons for his poor form in the 2013 F1 season - "family tension." Sauber driver Esteban Gutierrez has revealed the extent of his struggle for form so far in 2013 season. The 22-year-old driver has struggled but an improved Sauber led to his first points (six of them - at Suzuka) and radically boosted his chances of staying with the team for a second season.'I MADE SOME MISTAKES'Gutierrez said: "Coming up in F1 is not easy, you have to go step by step. I made some mistakes early in the season, like all rookies, but then it was a matter of putting in place all the pieces of the puzzle."The team knows how hard I've worked, and am still working, to get everything in place to grow as a GP driver, and to grow with the team."Gutierrez revealed that he was adjusting to his new fame: "Many things changed for me. We have a big family in Mexico and the life of each member was affected radically and quicklyl. This has created tensions."This is not something I've mentioned or shown in the media but it was unavoidable and it has an impact." Stay with Wheels24 for the 2013 F1 season – fresh reports every day.