Question: Who is the  current commissioner of World TeamTennis, Ross Case or Ilana Kloss?

Context paragraphs:
2016 World TeamTennis season: The 2016 World TeamTennis season was the 41st season of the top professional team tennis league in the United States.  Pursuant to a sponsorship agreement with Mylan N.V., the official name of the league was Mylan World TeamTennis in 2016.

Kastles Stadium at The Wharf: The Kastles Stadium at The Wharf was a tennis stadium on the Southwest Waterfront in Washington, D.C. Built in 2011, the stadium was the home venue for the Washington Kastles tennis team.  The stadium was opened on June 14, 2011, with a ribbon-cutting ceremony attended by Billie Jean King, Ilana Kloss, District of Columbia mayor Vincent Gray, and others.  The Kastles opened their 2011 season on July 5 at the stadium playing against the Kansas City Explorers.

2017 World TeamTennis season: The 2017 World TeamTennis season is the 42nd season of the top professional team tennis league in the United States.  Pursuant to a sponsorship agreement with Mylan N.V., the official name of the league is Mylan World TeamTennis in 2017.

Linky Boshoff: Delina Ann Boshoff-Mortlock, commonly known as Linky Boshoff, (born 12 November 1956), is a former professional tennis player who won the 1976 US Open women's doubles title with her partner Ilana Kloss.

Ilana Kloss: Ilana Sheryl Kloss (born 22 March 1956) is a former professional tennis player, tennis coach, and the current commissioner of World TeamTennis, a position that she has held since 2001.

2014 World TeamTennis season: The 2014 World TeamTennis season was the 39th season of the top professional team tennis league in the United States.  Pursuant to a sponsorship agreement with Mylan N.V., the official name of the league was Mylan World TeamTennis in 2014.  The Washington Kastles defeated the Springfield Lasers in the WTT Final to win their fourth consecutive King Trophy.

2017 Philadelphia Freedoms season: The 2017 Philadelphia Freedoms season will be the 17th season of the franchise (in its current incarnation) in World TeamTennis (WTT).

2014 Philadelphia Freedoms season: The 2014 Philadelphia Freedoms season was the 14th season of the franchise (in its current incarnation) in World TeamTennis (WTT).

2015 World TeamTennis season: The 2015 World TeamTennis season was the 40th season of the top professional team tennis league in the United States.  Pursuant to a sponsorship agreement with Mylan N.V., the official name of the league was Mylan World TeamTennis in 2015.  The Washington Kastles defeated the Austin Aces in the WTT Final to win their fifth consecutive King Trophy.

Ross Case: Ross Case (born 1 November 1951) is an Australian former tennis player.  His career-high singles ranking was world no. 14.

Supporting paragraphs: Ross Case Ilana Kloss
Answer: Ilana Sheryl Kloss