Bangladesh, March 21 -- Miami Gardens, Mar 21(AP/UNB) - Roger Federer has won one trophy so far in 2019, which puts him in a tie for the ATP lead - with 18 other players.

That same type of unprecedented parity is happening in the WTA, too, with 13 different champions from 13 tournaments.

No tennis season in the Open era's 50 years ever started this way for the men or women, let alone both. As the tours shift to the Miami Open this week and next, there is a level of depth and a lack of supremacy that Federer, for one, finds intriguing.

"Definitely says something about (how) there is shifting going on, on both tours. That it's maybe harder to dominate. Or it's harder to keep on, sort of, having the same winners," Federer said Wednesday. ...