F1 rookie Esteban Gutierrez has revealed the extent of his struggle for form this year.
The 22-year-old Mexican has struggled for much of 2013, but an improved Sauber and boosted confidence led to his maiden points - 6 of them - at Suzuka last weekend.
His chances of staying at the Swiss team for a second season have therefore been radically boosted.
"Coming up in formula one is not easy, you have to go step by step," Gutierrez told the French magazine Auto Hebdo.
"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...
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