Light-by-light scattering and high mass dilepton production in UPC

Photon-photon fusion is a rare process at hadron and ion colliders. It is particularly interesting as a remarkably clean interaction with little (if any) remnant activity from the interacting particles. In this talk we present the status of photon-photon fusion measurements resulting in either two photons ($\gamma\gamma \rightarrow \gamma\gamma$) or two charged leptons ($\gamma\gamma \rightarrow l^{+}l^{-}$) in the final state measured by the ATLAS and CMS experiments in ultra-peripheral collisions.