The Arsenal legend is surprised by the 23-year-old's transition to English football.
The 23-year-old, who joined from Inter Milan in 2013, is in his third full season with the Reds and has emerged as one of the division's most exciting young players, with Coutinho nominated for the PFA Young Player of the Year award for his contribution in the 2015-16 campaign.
Since Luis Suarez left Anfield in 2014, the Brazilian playmaker has arguably been Liverpool's strongest performer, but even during the 2013-14 term - his first full season - Coutinho has looked a hugely promising player.
Silva, who won the Premier League with the Gunners in 2004, knows a bit about what it takes to impress in England's top flight, and the former midfielder is delighted with how his compatriot is flying the flag for Brazil.
“It’s amazing to see how quickly he adapted to English football and the Premier League," he said to Inside Futbol.
"It is good to see the Brazilian players doing well in England; their good work is important to keep the doors open for Brazilian players in England in the future. That’s very good to see.”
Coutinho, who has netted seven times in 20 Premier League starts this season, is almost certain to finish behind Tottenham's Dele Alli in the Young Player of the Year stakes.