The Davis Cup rankings were released after the opening weekend of the 2012 Davis Cup.
Is the rankings a fair reflection of the strength of its players on the ATP tour? How does one reflect on the two sets of rankings?
It is fairly straight-forward to assume that the number of players in the Top 50 is proportional to the country's performances in the Davis Cup. The higher the number of players, the better a team plays (given that it has a larger number of players to dip into).
A player might not opt to play the Davis Cup because of their individual schedules. The restriction on the number of players who can play the fixtures is also a factor on the comparison.
Let us look at the Top Eight teams ranked by the ATP to check the above assumptions.