Hakon Haraldsson's 68th-minute strike earned Lille a 1-1 draw at Borussia Dortmund after Karim Adeyemi had given the hosts a half-time lead in the first leg of their Champions League last-16 tie on Tuesday.

The Germans, last year's finalists, were frustrated by the result after failing to extend their lead in the opening period despite creating several chances.

They took their foot off the gas after the break and conceded a deserved equaliser to the French, who were patiently waiting for their chance.

It took Dortmund some time to get into the game before Adeyemi gave them the lead in the 22nd minute with an unstoppable low drive that went in off the post.

Nico Schlotterbeck came close to adding a second in the 38th minute, but his powerful shot went just wide. Pascal Gross could have scored from close range on the stroke of half-time, but he was flagged offside.

The Germans, who have struggled in the Bundesliga this season and are in danger of missing out on next season's Champions League in 10th place, eased off after the break.

Lille, who had struggled to break down a solid Dortmund rearguard for over an hour, finally broke through with a quick passing move when an off-balance Haraldsson beat goalkeeper Gregor Kobel.

Haraldsson became only the second Icelandic player to score in the knockout stages of the Champions League.

Despite some late pressure, Dortmund failed to create any clear-cut chances and then saw Daniel Svensson forced off with a suspected knee injury after Lille's Andre Gomez stepped on his foot from behind.

"Tough game today and we did not show what we had set out to do," said Adeyemi. "Now we have to do it at their stadium. We had wanted to keep a clean sheet and score as many as possible."

The return leg in France is on March 12.