Cristiano Ronaldo

Like father, like son: Watch Cristiano Ronaldo training with 4-year-old son on the lawn

Published May. 15, 2015 2:27 p.m. ET

Brett Smiley

Cristiano Ronaldo found the "perfect training partner" on Friday — his four-year-old son, Cristiano Jr.

Check out this cute video as the youngster accepts his father's challenge and powers his way to 10 legitimate sit-ups.

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