David Luiz warns of "amazing" Diego Costa

David Luiz has warned his Paris Saint-Germain teammates that combating the "amazing" Diego Costa could hold the key to beating Chelsea in the Champions League.

The Brazil-born hitman is expected to face PSG in tonight's first-leg second-round encounter in Paris after completing a three-game domestic ban.

Costa has netted 17 times in 19 Premier League games this season, and Luiz warns that his compatriot is one that Les Parisiens will need to shackle.

"He's a good striker and he has started scoring goals with confidence," he told UEFA.com. "He is an amazing player."

The 26-year-old is yet to score in any of his five Champions League appearances this season.