Russian billionaire Roman Abramovich listens as Turkish President Tayyip Erdogan (not seen) addresses Russian and Ukrainian negotiators before their face-to-face talks in Istanbul, Turkey March 29, 2022 in this screen grab taken from a video. Turkish Presidency via Reuters TV/Handout via REUTERS ATTENTION EDITORS - THIS PICTURE WAS PROVIDED BY A THIRD PARTY. NO RESALES. NO ARCHIVES.