The England striker’s two-goal performance in the second half powered Arsenal to a 2-1 come-from-behind triumph over their Spanish opponents in the WCL.
The hosts created plenty of opportunities during the first half, but former Arsenal player the Scottish midfielder sent the visitors in front on the brink of the interval with a superb strike.
Chloe Kelly sent a dangerous corner into the area in the opening stages, but the Norwegian headed wide. Shortly after, Weir had a opportunity stopped at the other end.
The attacker sent an attempt above the crossbar as the hosts pressed for an opener, and Misa RodrÃguez collected the midfielder’s next attempt.
Emily Fox made a solid challenge to turn Athenea del Castillo's strike behind for a corner. Despite their solid start, the home team fell behind in the final moments of the half after a stunning finish from Weir.
A bending set-piece was headed by the defender into the way of the midfielder just within the penalty area, and she drilled a first-time shot past Daphne van Domselaar.
The German had an effort deflected after the break, but Arsenal equalized in the 53rd minute when Kelly’s delivery was headed past RodrÃguez by the forward.
The attacker had a mis-hit attempt gathered by the Madrid shot-stopper before Arsenal took the lead in the later stage. Beth Mead launched a corner to the striker lurking on the border of the goal area, and the forward powered a thumping header into the net.
The goalscorer persisted to pose a threat and was flagged for being beyond the last defender on two occasions after getting into dangerous positions.
Alba Redondo broke forward for Madrid in the final stages but had her effort held by the Arsenal keeper as the home side saw out the victory.
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