Tennis great Rafael Nadal has hailed his teammates on Spain's Davis Cup team for the ``exceptional'' achievement of reaching a ninth final but said he wasn't sure he would recover in time for the showdown with the Czech Republic. Nadal was honoured in Madrid on Monday night as Person of the Year by the Spanish edition of Vanity Fair and told reporters he is happy ``to be part of a great era for Spanish sport.'' The injured 26-year-old began the summer on a high note by capturing a record seventh French Open title with a victory over then-world No.1 Novak Djokovic of Serbia in the final. However the No.4 ranked Nadal has not played since his shocking second-round loss at Wimbledon. He said in a Twitter posting in early September that he would be sidelined for the next two months with lingering knee problems. ``I have missed the Olympics and the United States Open. What's most important now is to recover well and return when I can,'' Nadal said in Madrid. ``These are not joyous times, but neither should we deceive ourselves. ``I have a career behind me and one ahead of me. I'm injured now, it's part of my profession.'' Spanish Vanity Fair bestows its Person of the Year prize on the individual deemed to exercise the ``most influence'' on society ``in any of its spheres.'' Last year's recipient was Nobel literature laureate Mario Vargas Llosa. Vanity Fair said it selected the tennis star for the honour based on his accomplishments as an athlete and on the good works of the Rafa Nadal Foundation. Nadal said in an interview published on Monday in Vanity Fair that he was not sure ``how long'' he would keep ``playing tennis'' and that he was enjoying ``one of the best seasons'' of his career ``until the knee injury.'' ``I don't know how long I will keep playing tennis. I'll be 31 in five years and taking into account the fact that I started at 16 ... Perhaps stopping now will help extend my career a little bit more. Until I had the problems with the knee again, the final at Roland Garros, had been one of the best seasons of my life. I felt able to win any competition. Complicated times came later,'' Nadal said. ``Success is not the victory, it's what you've done to win. The knowledge that you've done everything in your power to achieve what you wanted. That feeling makes me very happy. This year I lost the final in Australia and I didn't like it, but I was happy in some ways. It was a success to have lost like that,'' the tennis star said. The Spaniard, known for his physically demanding style of play and incredible defensive skills, has struggled to stay healthy during his career, having been forced to withdraw from each of the four grand slam events due to various injuries. AAP.