LONDON, April 27 -- European champions Arsenal capitalised on two terrible defensive blunders by Lyon on Sunday to come from behind and win the first leg of their Women's Champions League semi-final 2-1.

The French league leaders went ahead in the 18th minute at the Emirates Stadium when Jule Brand scored with the visitors' only shot on target in the first half.

But the Gunners rallied afer the break and levelled courtesy of an own goal from Ingrid Engen after goalkeeper Christiane Endler failed to gather the ball.

They took the lead when Olivia Smith took advantage of another mix-up at the back late in the game.

The two sides met at the same stage of the competition last season, with Arsenal winning 5-3 on aggregate before going on t...