Marcos Daniel
- Date of birth: July 4, 1978
- Birthplace: Passo Fundo, Brazil
- Residence: Passo Fundo, Brazil
- Height: 5'11'' (1.80 m)
- Weight: 170 lbs (79 kg)
- Plays: Right-handed; one-handed backhand
Marcos Diniz Daniel was born on July 4th, 1978 in Passo Fundo, Rio Grande do Sul. He turned professional in 1997 and reached his highest singles ATP-ranking on August 10, 2009, when he became World Number 57. He is coached by his brother, Marcio.
