Ulsan Hyundai goalkeeper Kim Young-kwang believes Mexican side Monterrey are capable of beating Chelsea this week.
The CONCACAF champions beat South Korean club Ulsan 3-1 in the FIFA Club World Cup quarter-finals in Japan on the weekend and Kim has suggested that they can do a surprise job on European title-holders Chelsea in the final four.
"I learned a lot about football from today's defeat; there are a lot of really good football players in the world," Kim told reporters.
"No.9 [Aldo de Nigris] and No.14 [Jesus Manuel Corona] played very well, they had speed and their technique was even greater.
"Monterrey play very well; they might beat Chelsea."