Holders Barcelona produced a second-half blitz to come from behind and beat Athletic Bilbao 3-1 to book a place in the King's Cup semi-finals after Atletico Madrid crashed out in a shock 3-2 defeat by Celta Vigo. Inaki Williams put Bilbao ahead after 12 minutes against a lacklustre Barca who held a 2-1 lead from the first leg. The Catalan side woke up in the second half with in-form Luis Suarez knocking in the equaliser. A Gerard Pique header after 81 minutes put Barca ahead and Neymar cracked in a drive in stoppage time. Pablo Hernandez scored twice for Celta to stun Atletico who lie second in La Liga. The first leg had finished 0-0 but the return was a feast of attacking football in which Celta showed the greater cutting edge. Hernandez nodded home after 22 minutes and although Antoine Griezmann pounced on a rebound to equalise, John Guidetti struck from distance to restore the visitors' advantage after 56 minutes. Celta extended their lead through another Hernandez header and Atletico could only pull one goal back through substitute Angel Correa nine minutes from time. Atletico coach Diego Simeone again left striker Jackson Martinez on the bench with Luciano Vietto partnering Griezmann in attack. Both sides went into the game struggling for goals with Atletico's 0-0 draw with Sevilla on Sunday costing them the lead in La Liga. Atletico's Koke struck an early shot just wide and Saul Niguez had an effort saved by keeper Ruben Blanco before Celta took a surprise lead with Hernandez given space to head in a Fabian Orellana cross. Griezmann slotted home after a Yannick Carrasco shot was parried into his path by Blanco but Celta took charge of the match at the start of the second half. Saul gave the ball away to Guidetti who powered home a 25-metre drive and Correa struck the crossbar at the other end before Hernandez got his second with a header from Hugo Mallo's cross. Correa finished clinically after a fine run but Celta held out, despite being pinned back in the closing stages, to reach the semi-final of the cup for the first time in 15 years. (For more sports news andupdates, followAhramOnlineSportson Twitter at@AO_Sportsand onFacebookatAhramOnlineSports.) http://english.ahram.org.eg/News/186095.aspx