Bayern Munich coach Pep Guardiola has warned his players against complacency ahead of the second leg of their Champions League last-16 clash against Shakhtar Donetsk.

The German champions, who are among the favourites to win the competition, were held to a goalless draw in Lviv three weeks ago.

Despite Bayern being expected to reach the quarter-finals, Guardiola insists that Shakhtar are capable of springing a surprise on Wednesday.

"Maybe tomorrow it'll be a surprise and we have to be prepared. This game is like a playoff in basketball with the first game and the second game," he is quoted as saying by Sky Sports News.

"The game and the strategy defensively and the way to attack can change. We know each other better, exactly what they did and they know as well what we did. In general, I think they are going to play in the same way. The difference is the quality of the players. At the end, it depends on the quality of the players in both teams."

Bayern are currently on an eight-match unbeaten run in all competitions.