Loading...Juan Martin del Potro v Damir Dzumhur HighlightsJuan Martin del Potro v Damir Dzumhur HighlightsHIGHLIGHTSMADRID2018R25:14Watch all the highlights as fourth seed Juan Martin del Potro began his 2018 clay court campaign with a second round meeting with Damir Dzumhur.