Britain Tennis - Great Britain v Argentina - Davis Cup Semi Final - Emirates Arena, Glasgow, Scotland - 16/9/16 Great Britain's Andy Murray during his match against Argentina's Juan Martin del Potro Action Images via Reuters / Andrew Boyers Livepic

Joffre Mbangila (R), 17, of the Democratic Republic of Congo, tries to escape from a defender during a recent indoor practice with Soccer Without Borders in Baltimore, Maryland, U.S., July 28, 2016. Picture taken July 28, 2016. REUTERS/Nathan Frandino

Eritrean refugee Johne Teweldebirhan, 18, takes a kick from the sidelines during a recent indoor practice with Soccer Without Borders in Baltimore, Maryland, U.S., July 28, 2016. Teweldebirhan came to the U.S. from Port Sudan, Sudan last year. Picture taken July 28, 2016. REUTERS/Nathan Frandino

Oscar, 13, of Honduras, takes a break while in goal during a recent indoor practice with Soccer Without Borders in Baltimore, Maryland, U.S., July 28, 2016. Picture taken July 28, 2016. REUTERS/Nathan Frandino

Participants play at a recent indoor practice with Soccer Without Borders, in Baltimore, Maryland, U.S., July 28, 2016. Picture taken July 28, 2016. REUTERS/Nathan Frandino

U.S. women's soccer team midfielder Megan Rapinoe speaks to the media during a Nike unveiling event in New York, March 17, 2016. REUTERS/Eduardo Munoz

The facade of the Guatemala's soccer federation (Fedefut) building is pictured in Guatemala City, February 23, 2016. To match Insight SOCCER-FIFA/PROBE-GUATEMALA REUTERS/Josue Decavele

Football Soccer - Paris Saint-Germain v Arsenal - UEFA Champions League Group Stage - Group A - Parc des Princes, Paris, France - 13/9/16 Former French President Nicolas Sarkozy in the stands Reuters / Gonzalo Fuentes Livepic