#1 Bjorn Borg
Without a shred of doubt, the greatest Swedish tennis player of all time has to be the legendary Bjorn Borg.
Known for his remarkable composure and ability to play the game at very high levels without displaying any signs of emotion, Borg was a superstar in the 1970's and 1980's.
His 89.81 % career win percentage at Grand Slams is the best of all time, and looks unlikely to ever be surpassed by anyone. Borg is one of only four players to have won three or more Grand Slam tournaments without dropping a single set.
The master of marathon matches, Borg just lost three out of 27 matches in his career that went the full distance of five sets.
With 11 Grand Slam titles and 64 ATP titles overall, Borg retired at the young age of 26 while still at the peak of his game. If he would have carried on playing for 5-6 more years, the Big 3 of today would likely still be chasing his Grand Slam tally.