Best Answer: Today, the national average for the diamonds chosen for engagement rings with regard to carat weight is 0.38 carats. In general, the carat weight averages of engagement ring diamonds are increasing.
Now have you ever wondered what is up with tennis players and the noises they make when hitting the ball back and forth. Well, they have every right to make these noises. Venus Williams served the world's fastest tennis ball among women which was clocked at 56.95 m/s (127.4 mph). That's twice the speed limit on a regular highway in New York City. Tilden holds the title of World's fastest tennis ball served among men with a speed of 73.14 m/s (163.6 mph).
And while the match finished far short of the 3-day John Isner-Nicolas Mahut 11:05 2010 Wimbledon epic, it ranks as the longest Davis Cup singles match ever. History was made. Hereâs the list of the longest singles in tennis history: 11 h 05 Wimbledon 2010, 2nd round: John Isner def. Nicolas Mahut, 6â4, 3â6, 6â7(7â9), 7â6(7â3), 70â68 (3 days) 6 h 43 Davis Cup 2015, 1st round: Leonardo Mayer def.