Premise: Rod Laver . Despite being banned from playing the Grand Slam tournaments for the five years prior to the Open Era , he still won 11 singles titles . He is the only player to twice achieve the calendar-year Grand Slam , in 1962 ( pre-open era ) and 1969 ( open era ) , and remains the only man to do so during the Open Era . He also won eight Pro Slam titles , including the calendar year Pro `` Grand Slam '' in 1967 , and contributed to five Davis Cup titles for Australia during an age when Davis Cup was deemed as significant as the Grand Slams .
Hypothesis: Rod Laver has yet to win any Pro Slam titles.
Label: CONTRADICTION