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'Thinker' Cilic's search for winning grand slam formula

Paris (CNN)Marin Cilic describes himself as a "thinker." Deeply reflective, the Croatian is one of only three players outside the Big Four to win a grand slam in the last decade and he's very conscious of not wanting to stop at one. Don't be surprised, either, if the ongoing grass-court swing is where Cilic turns his season around after a right-knee injury heavily contributed to his ranking slipping to a five-year low. "I understand that this year hasn't been a great one for me," Cilic told CNN Sport. "It's a challenging season but I'm still very positive in terms of my game. I feel my game is there and I just have to unlock it in a couple of good events. "I'm feeling that the second part of the season could be a really good one. Fingers c ...