THEN AND NOW: How the world's biggest sports stars have changed over the decade

Tom Brady in 2010 (33).

Tom Brady now (42).

LeBron James in 2010 (25).

LeBron James now (34).

Serena Williams in 2010 (29).

Serena Williams now (38).

Lionel Messi in 2010 (23).

Lionel Messi now (32).

Michael Phelps in 2010 (25)

Michael Phelps now (34).

Roger Federer in 2010 (29)

Roger Federer now (38).

Tiger Woods in 2010 (34).

Tiger Woods now (43).

Cristiano Ronaldo in 2010 (25).

Cristiano Ronaldo now (34).

Megan Rapinoe in 2010 (25)

Megan Rapinoe now (34).

Clayton Kershaw in 2010 (22).

Clayton Kershaw now (31).

Stephen Curry in 2010 (22).

Stephen Curry now (31).

Alex Ovechkin in 2010 (25).

Alex Ovechkin now (34).

Diana Taurasi in 2010 (28).

Diana Taurasi now (37).

Floyd Mayweather in 2010 (33).

Floyd Mayweather now (42).

Aaron Rodgers in 2010 (27).

Aaron Rodgers now (36).

Maria Sharapova in 2010 (23).

Maria Sharapova now (32).

Bryce Harper in 2010 (18).

Bryce Harper now (27).

Rafael Nadal in 2010 (24).

Rafael Nadal now (33).

James Harden in 2010 (21).

James Harden now (30).

Lindsey Vonn in 2010 (26).

Lindsey Vonn now (35).

Sidney Crosby in 2010 (23).

Sidney Crosby now (32).

Carli Lloyd in 2010 (28).

Carli Lloyd now (37).

Novak Djokovic in 2010 (23).

Novak Djokovic now (32).

Shaun White in 2010 (24).

Shaun White now (33).

Justin Verlander in 2010 (25).

Justin Verlander now (36).

Now, check out which athletes owned the 2010s....

The most dominant athletes of the decade >