Even the most ardent Mets fan would have to admit there have been precious few must-see games involving the Mets in recent years. But Friday night at Citi Field was different. It was electric, the way it was when Doc and Straw and Keith and The Kid played before raucous packed houses night in and night out at Shea. Friday night was all about Matt Harvey vs. Stephen Strasburg, two of the game’s brilliant young guns. The first must-see Mets game in quite some time – one that even had Doc Gooden making a rare appearance at Citi Field, one that inspired him to tweet, “Nothing like an old school pitching duel.” Gooden had to like what he and the rest of the 26,675 on hand saw from Harvey as the he outdueled Strasburg as the Mets defeated him for the first time with a 7-1 victory. The win also featured a pair of homers each by Ike Davis and Lucas Duda. Harvey went seven innings and allowed just one run on four hits and fanned seven to run his record to 4-0. Strasburg, who dropped to 1-3, lasted six innings and was touched up four runs (two earned) and surrendered two homers. After jumping on Strasburg for a pair of runs in the first, the Mets nursed their 2-0 lead until the sixth. With Strasburg approaching the 100-pitch plateau, the Mets started flexing some long-ball muscle as Davis took Strasburg’s first pitch of the sixth and parked it in the left-field stands for a 3-0 lead. One out later, it was Duda’s turn and he crushed the 101st pitch of the night by Strasburg and launched it deep into the center field seats for a 4-0 cushion. The latter blast led to a chorus of “Harvey’s better!” from the giddy Mets populace. The Nats had their best opportunity to get back into the game in the seventh when Adam LaRoche walked to open the inning and came around to score after back-to-back singles by Ian Desmond and Chad Tracy. After an error by David Murphy on Steve Lombardozzi’s grounder loaded the bases with none out, Harvey was facing his first and only crisis of the evening. But he struck out Kurt Suzuki, got pinch-hitter Roger Bernadina to foul out to John Buck and induced Denard Span to ground out to second to escape the jam.