There's no going back from here. Well, there was probably no going back two months ago; but the rivalry between Frank Lampard and Jurgen Klopp has now reached a critical juncture.
As Chelsea prepare to meet Liverpool for the first time since Lampard's X-rated rant sparked a war of words between the bosses, familiar memories of a clash from yesteryear are evoked which Lampard knows all too well.
Last season Klopp would hardly have felt threatened by Lampard's presence in the dugout. After all, Chelsea were at the start of a new era filled with youth products and almost starved of big-name signings.
This time it's different, and you can already feel the tension between both managers in what looks to be a situation with its most fearsome
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