Argentina's Juan Martin del Potro and world No. 7 Kei Nishikori have signed up to play the Delray Beach Open next year, per Michal Samulski. Del Potro, 30, impressed in his Delray Beach debut as he made it all the way at the tournament in 2011 after beating former top-10 player Janko Tipsarevic in the final.
The Argentine didn't defend his title the following season as it took him five years before he played another match on the hard courts of Delray Beach. However, the 30-year-old has been a regular participant of the Delray Beach event for the past couple of years as he is set to make his fifth consecutive appearance at the tournament.
Del Potro will be joined in Delray Beach by Nishikori, who put an impressive run at the tournament in 2008 -- when he captured the title as qualifier in his debut campaign. Meanwhile, defending champions Bob Bryan and Mike Bryan have been confirmed for the Delray Beach doubles event.
The Bryans brothers have had lots of success on the hard courts of Delray Beach as they will be aiming to win their sixth Delray Beach title next year.