KARL HEIN will never forget his Arsenal debut - for all the wrong reasons.<br /><br />The Estonian keeper’s first half blunder allowed Brighton to equalize and then go on to take the wind out of Mikel Arteta’s high-flying side with a stunning comeback victory.<br /><br />Hein, 20, was a shock inclusion in the starting line-up for the Premier League leaders as they looked to build on a three game winning streak in the Carabao Cup.<br /><br />And the Emirates Stadium was bouncing when Eddie Nketiah fired Arsenal ahead in the 20th minute with a classy right foot finish from just inside the box.<br /><br />A powerful run by Reiss Nelson split the Albion defence before a perfectly-weighted lay off fell for the striker to bend a shot past Jason Steele.<br /><br />But the lead was short-lived and Hein was lucky to stay on the pitch after his unlucky slip as he raced off his line to meet Danny Welbeck’s run towards his goal.<br /><br />Hein stumbled and in his recovery tugged the Brighton striker to the floor.<br /><br />Welbeck turned in the penalty to equalise and from then on it was all revitalized Brighton as they rocked Arsenal with two second half goals to secure a thrilling win.<br /><br />Hein was squarely beaten as Albion sub and Japan winger Kaoru Mitoma bent a shot beyond him on 58 minutes to claim his second goal in as many matches.<br /><br />And full back Tariq Lamptey sealed a memorable night for The Seagulls with number three 19 minutes from time - his first goal for more than two years.<br /><br />The deflating defeat is Arsenal’s first at home since April which was ironically a Premier League reverse against Brighton. <br /><br />Arteta’s rejuvenated Arsenal had won 12 games on their own turf in a row prior to last night’s surprise setback.<br /><br />Eager to maintain impressive runs of form, both bosses named relatively strong sides but with a hint of experimental flavor.<br /><br />Arteta had keeper Turner on his bench even though the USA’s number one was named in his country’s squad for the World Cup prior to kick off, was not starting.<br /><br />Turner has been injured recently suggesting he is not quite there yet in terms of fitness with the Group B game against England just 15 days’ away now.<br /><br />Arsenal hit the post in the second half through Nketiah but Arteta had hoped to give some of his bigger stars a night off ahead of Saturday’s Premier League clash at Wolves - their last game before the World Cup.<br /><br />But with the tie slipping away from him he was forced to bring on striker Gabriel Jesus in a bid to break down Brighton and stay in a competition that is much-criticized from the outside but which is hugely popular with fans.<br /><br />With the 60,000 capacity Emirates Stadium rapidly emptying, Nelson managed a shot with three minutes left only for it to drift harmlessly wide.<br /><br />Brighton manager Robert De Zerbi is now toasting a hat-trick of wins which now includes the current best team in the country and Champions League contenders Chelsea.<br />
