MUNICH, Apr 18 (SW) - With a four-point lead atop the Bundesliga, Bayern Munich are confident of claiming their 20th domestic title but remain wary of a late charge by Hamburg SV.

"Four points isn't a huge lead. Our rivals could quickly reel in a four point margin," Bayern manager Felix Magath warned.

"We need to take Hamburg extremely seriously. We mustn't start thinking the title race is over."

General Manager Uli Hoeness echoed the sentiment: "We can't sit back and relax yet."

Bayern had enjoyed a 10-point lead after the 21st round, but with only one win in their last three matches, they have allowed a tireless Hamburg, who have won their last three matches without conceding, to close the gap.

Hamburg’s fine form has given the northern club confidence, with defender Bastian Reinhardt saying, "If we can win our last four matches, it'll be very exciting. The way Bayern are playing at the moment, I don't believe they'll always win."

Midfielder David Jarolim added: "If we win all four games, we'll be champions."

Hoeness, however, remains confident.

"We have no need to be nervous," he insisted. "Hamburg have a far more difficult run-in, they're four points behind, and they have a worse goal difference."

Bayern travel to Mainz 05 on Sunday and Hamburg host Bayer Leverkusen on Saturday.