Bradley Cooper & Irina Shayk -- Wimbledon Tears Due to Pollen ... Not a Fight

Bradley Cooper and Irina Shayk didn't have a heated argument that drove her to tears ... she just needed some Claritin ... according to people who know them, anyway.

The longtime couple made headlines at Wimbledon when TV cameras caught them having what appeared to be a lovers' spat. Irina was wiping away a tear, and Bradley seemed pissed.

But sources close to the couple tell us the supermodel was simply battling allergies. As for Bradley's apparent side-eye? We're told he was actually talking to retired tennis star Stefan Edberg, who was sitting next to Irina. TV cameras didn't show Edberg, which made it seem like Bradley was peeved at Irina.

Look, who knows -- it was a very brief shot, anyway -- but for what it's worth ... the couple definitely looked happier later in the match.