Keenan Mayo's doubles winning streak snapped

   Keenan Mayo's doubles winning streak ended today at seven matches. 
   Barely.
   The 17-year-old product of Roseville in the Sacramento area and Tomas Kopczynski of Delray Beach, Fla., lost to Daniil Glinka of Estonia and Sumit Sarkar of New York 6-1, 1-6 [10-8] today in a battle of unseeded teams in the boys 18 quarterfinals at the Orange Bowl on clay in Plantation, Fla.
   Mayo won last week's Eddie Herr title in Bradenton, Fla., with Adrian Andreev of Bulgaria. Mayo's brother, Aidan, reached the singles semifinals in the Eddie Herr 14s.
   Keenan Mayo has signed a letter of intent to play at Illinois next fall.
   The Orange Bowl was founded by Eddie Herr in 1947. It was played on clay until 1998, then on hardcourts until 2011. It has been contested on clay again since then.
   Past singles winners of the Orange Bowl 18s include Chris Evert (1969-70), Bjorn Borg (1972), John McEnroe (1976), Ivan Lendl (1977), Gabriela Sabatini (1984), Mary Joe Fernandez (1985), Jim Courier (1987) and Anna Kournikova (1995).
   Singles winners of the tournament on hardcourts include Roger Federer (1998), Elena Dementieva (1998), Andy Roddick (1999), Vera Zvonareva (2000 and 2001), Marcos Baghdatis (2003) and Caroline Wozniacki (2005).