DeVante Parker’s answer to an Instagram poll Monday night set off Michael Thomas and started a war of words between the wide receivers.

The NFL on Fox’s Instagram account asked: Which is tougher? A. Make a catch while guarded by Stephon Gilmore, or B. Break up a pass while guarding Michael Thomas.

Parker, who had a breakout year for the Miami Dolphins last season, answered “A” in the comments of the post, which didn’t sit well with the New Orleans Saints star receiver.

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Thomas was drafted in the second round of the 2016 draft and has gone on to set records for most receptions in a single season (149 last year) and most receptions in a player’s first four seasons (470). He has led the NFL in receptions in each of the past two seasons and in receiving yards (1,725) last year.

Flip the Page to see their back and forth: