<p>Novak Djokovic said sealing the year-end men's world number one tennis ranking had eased some of the pressure on him as he heads into the ATP Finals and will look to end his season on a high.</p>.<p>The 33-year-old is bidding for a sixth crown in the season-ending tournament to go level with Roger Federer and will take on Argentine Diego Schwartzman in his opener on Monday.</p>.<p>"Coming into the tournament knowing I already clinched the year-end number one releases some of the pressure, but at the same time it doesn't change what I hope to achieve in this tournament and why I'm here," Djokovic told reporters.</p>.<p>"I really want to win every single match that I get to play and try to get my hands on the trophy... I want this trophy as much as anyone here.</p>.<p>"I'm really hoping I can end the season in the best possible way and the success I had previously here in the past 10 years helps me feel more comfortable and confident about myself."</p>.<p>Second-ranked Nadal, who meets Russian Andrey Rublev on Sunday, is hoping to clinch his first ATP Finals title on the hard courts of London's O2 Arena.</p>.<p>"I don't know how close I am to the perfect preparation. I tried to fight hard in every match in Bercy," Nadal said on Friday of his semi-final run at last week's Paris Masters.</p>.<p>"That put me in a position that I already played four matches on this surface and hopefully that can help me here, but there remains two days for me to practise.</p>.<p>"I hope to be ready to accept the challenge to play against such difficult opponents like Rublev." </p>
<p>Novak Djokovic said sealing the year-end men's world number one tennis ranking had eased some of the pressure on him as he heads into the ATP Finals and will look to end his season on a high.</p>.<p>The 33-year-old is bidding for a sixth crown in the season-ending tournament to go level with Roger Federer and will take on Argentine Diego Schwartzman in his opener on Monday.</p>.<p>"Coming into the tournament knowing I already clinched the year-end number one releases some of the pressure, but at the same time it doesn't change what I hope to achieve in this tournament and why I'm here," Djokovic told reporters.</p>.<p>"I really want to win every single match that I get to play and try to get my hands on the trophy... I want this trophy as much as anyone here.</p>.<p>"I'm really hoping I can end the season in the best possible way and the success I had previously here in the past 10 years helps me feel more comfortable and confident about myself."</p>.<p>Second-ranked Nadal, who meets Russian Andrey Rublev on Sunday, is hoping to clinch his first ATP Finals title on the hard courts of London's O2 Arena.</p>.<p>"I don't know how close I am to the perfect preparation. I tried to fight hard in every match in Bercy," Nadal said on Friday of his semi-final run at last week's Paris Masters.</p>.<p>"That put me in a position that I already played four matches on this surface and hopefully that can help me here, but there remains two days for me to practise.</p>.<p>"I hope to be ready to accept the challenge to play against such difficult opponents like Rublev." </p>