Ruud lost the opening set but rallied to defeat Marcos Giron, securing his spot in the next round.
Having missed the Davis Cup and the Dallas ATP 500 to be with his wife Maria Galligani and their newborn, the 27-year-old is now back on court.
Casper Ruud Returns to Delray Beach After Fatherhood
Norwegian tennis star Casper Ruud returned to action at the ATP 250 Delray Beach tournament following the birth of his first child, defeating American Marcos Giron.