Which tennis player ranked higher in singles, Fabio Fognini or Marty Riessen?
Fabio Fognini:  His career-high singles ranking is world No. 13, achieved in March 2014, and world No. 7 in doubles, achieved in July 2015. Marty Riessen: Marty Riessen (born December 4, 1941) played amateur and professional tennis in the 1960s and 1970s.
i don't know