question: Who has won more titles, Michael Chang or Ellis Ferreira?
answer: Michael Te-Pei Chang
context: Title: 1998 Heineken Open – Doubles
  Passage: Ellis Ferreira and Patrick Galbraith were the defending champions, but Ferreira did not participate this year.  Galbraith partnered Brett Steven, successfully defending his title.
  Title: 1999 Gerry Weber Open – Doubles
  Passage: Ellis Ferreira and Rick Leach were the defending champions, but Leach did not participate this year.  Ferreira partnered Nicklas Kulti, losing in the quarterfinals.
  Title: 2002 Australian Open – Mixed Doubles
  Passage: Corina Morariu and Ellis Ferreira were the defending champions, but could not defend their title.  While Morariu did not compete this year, Ferreira partnered with Cara Black and lost in First Round to Rita Grande and Jeff Tarango in three sets.
  Title: Ellis Ferreira
  Passage: Ellis Ferreira (born 19 February 1970 in Pretoria, South Africa) is a former professional male tennis player from South Africa.  He played collegiately at the University of Alabama, earning all-SEC and all-American honors.  He won 2 Grand Slam doubles titles, the Men's title at the 2000 Australian Open with Rick Leach and the mixed doubles at the Australian Open with Corina Morariu in 2001.  Ferreira was named the Senior Assistant Men's and Women's Tennis Head Coach at Washington College in Chestertown, Maryland, in July 2007.  Ferreira is now the co-owner of the Eagleton/ Ferreira Tennis Academy on Longboat Key in Florida (www.eftennis.com).
  Title: 1998 CA-TennisTrophy – Doubles
  Passage: Ellis Ferreira and Patrick Galbraith were the defending champions but only Ferreira competed that year with Rick Leach.
  Title: 1998 Nottingham Open – Doubles
  Passage: Ellis Ferreira and Patrick Galbraith were the defending champions, but did not partner together this year.  Ferreira partnered Rick Leach, losing in the first round.  Galbraith partnered Brett Steven, losing in the first round.
  Title: 2002 Davidoff Swiss Indoors – Doubles
  Passage: Ellis Ferreira and Rick Leach were the defending champions but they competed with different partners that year, Ferreira with Pavel Vízner and Leach with Brian MacPhie.
  Title: 2002 BNP Paribas Masters – Doubles
  Passage: Ellis Ferreira and Rick Leach were the defending champions but they competed with different partners that year, Ferreira with Pavel Vízner and Leach with Brian MacPhie.
  Title: Michael Chang
  Passage: Michael Te-Pei Chang (born February 22, 1972) is a retired American professional tennis player.  He won 34 top-level professional singles titles, including the 1989 French Open when he was 17.  He also was a three-time runner-up at the majors and reached a career best ranking of world No. 2 in 1996.  Since he was shorter than virtually all of his opponents, he played a dogged defensive style utilizing his quickness and speed.  In 2008, he was inducted into the International Tennis Hall of Fame, and he has coached Kei Nishikori since 2014.
  Title: 2001 Australian Open – Men's Doubles
  Passage: Ellis Ferreira and Rick Leach were the defending champions, but Leach did not participate.  Ferreira paired with David Rikl but lost in the second round to Arnaud Clément and Sébastien Grosjean.
citations: Ellis Ferreira Michael Chang