Arsenal edges past Porto on penalties to reach Champions League quarterfinals for first time in 14 years
By Matias Grez, CNN Emirates Stadium, London (CNN) — If Arsenal fans had forgotten just how tense and grueling the Champions League knockout stages can be, their memories will now certainly be refreshed after a thrilling 4-2 penalty shootout victory over Porto in the round of 16. It had been seven years since the Gunners
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