In this task, you are given a context, a subject, a relation, and many options. Based on the context, from the options select the object entity that has the given relation with the subject. Answer with text (not indexes).

Context: Todd Martin (born July 8, 1970) is an American retired professional tennis player. He reached the Men's Singles final at the 1994 Australian Open and the 1999 US Open and achieved a career-high singles ranking of World No. 4., The Delray Beach Open is an ATP World Tour 250 series men 's professional tennis tournament held each year in Delray Beach , Florida , and played on hard courts . The event was held in Coral Springs from 1993 -- 1998 ; in 1999 , it was relocated to the Delray Beach Tennis Center . American Todd Martin won the tournament 's first singles event in 1993 . The tournament was previously named the Delray Beach International Tennis Championships ( ITC ) before being changed to its current name in 2014 ., The Australian Open is a major tennis tournament held annually over the last fortnight of January in Melbourne, Australia. First held in 1905, the tournament is chronologically the first of the four Grand Slam tennis events of the year  the other three being the French Open, Wimbledon and the US Open. It features men's and women's singles; men's, women's and mixed doubles and junior's championships; as well as wheelchair, legends and exhibition events. Prior to 1988 the tournament had been played on grass. Since 1988 two types of hardcourt surfaces have been used at Melbourne Park  green Rebound Ace to 2007 and blue Plexicushion from 2008., Subject: delray beach open, Relation: surface_played_on, Options: (A) grass (B) hardcourt
hardcourt