Raul made his name at Real Madrid before moving to Schalke in 2010, scoring 28 goals in 66 Bundesliga appearances for the Royal Blues. The former Spain striker, who retired in 2015 after a spell at the New York Cosmos, told goal.com: "I love Pulisic. The other day he scored in the win against Bayer Leverkusen. I've seen him for a while and the truth is I love his game."
Watch: Highlights of Dortmund's 6-2 thrashing of Leverkusen on Matchday 23:
Pulisic also played a key role in BVB's UEFA Champions League last 16 win over SL Benfica on Wednesday evening, scoring once and providing two assists in a 4-0 triumph to help Dortmund book their place in the quarter-finals.
The teenager has also contributed three goals and five assists in 19 Bundesliga appearances this term, as well as taking his tally of senior caps with the USMNT to 11 and impressing Raul at international level too.
"I saw him in two games with the USA national team, and I saw him against Mexico. I like him a lot," the former Spain striker said. "He's a player who can break through, he just needs to keep playing. Young players like Pulisic have the talent, they just need time to develop, and when they can play for important teams it helps that process."
Watch: Raul's top 5 Bundesliga goals: