November 18, 2017 - London, England, United Kingdom - Brazil's Marcelo Melo (R) and his partner Poland's Lukasz Kubot (L) celebrate beating US player Ryan Harrison and New Zealand's Michael Venus during their men's doubles semi-final match on day seven of the ATP World Tour Finals tennis tournament at the O2 Arena in London on November 18, 2017. (Credit Image: © Alberto Pezzali/NurPhoto via ZUMA Press)