Basel saw off Chelsea's Premier League rivals on penalties to make the semi-finals, and Benitez has admitted that they are a "dangerous" team to face in the last four after the two teams were drawn to play each other.
The 52-year-old told reporters: "Basel is not too far away so maybe playing them is a good option, but just because of that.
"They are a good team and they did well against Tottenham, so you can see that they are an offensive team.
"They play with a lot intensity so it will be a tough game. They are dangerous, for sure."
The first leg of the semi-final will take place in Switzerland on April 25, before the return match is played at Stamford Bridge on May 2.