'Right from 2002, making my debut and 22 years later still getting to represent India. I'm extremely proud of that.'
Blake will face fellow American Sam Querrey in the last eight after the teenager survived two match points before upsetting fifth-seeded Ivo Karlovic.
The 35-year-old beat Brazilian Ricardo Mello in the first round of the Delray Beach International.
A confident Rohan Bopanna will take on Thomaz Bellucci in the opening match of the Davis Cup World Group play-off tie between India and Brazil in Chennai on Friday.
India ended Day 1 in the Davis Cup World Group play-off tie against Brazil down 0-2 after Rohan Bopanna and Somdev Devvarma lost the opening singles, at the Nungambakkam stadium on Friday.
