This study examined the physical and technical demands ofthe 2010, 2014 and 2018 men's FIFA World Cups with special reference on extra time. Data were collected from 69 FIFA's open-access match reports (n= 3,238 individual players' observations) and scaled by individual playing exposure. Players covered less total distance (TD) from the Ist half to the extra time period (r=0.17-0.27; P<0.05). Moreover, the number of sprints decreased from the Ist half to the extra time (n=0.13-0.25; P<0.01). However, substitutes who started on or came in on the match throughout the 2nd half covered higher TD in the extra time compared to the 2nd half (r=0.11-0.43; P<0.01), and compared to Starters during the 2nd half and extra time (r=0.11 —0.36; P<0.05). Additionally, substitutes who started on, or came in throughout the extra time covered higher TD and performed more sprints compared to Starters during the extra time r=0.12-0.23; P<0.05). Generally, no meaningful differences were observed in successful shots and dribbles between periods of the match and between starting status (P>0.05). The occurrence of extra time appeared to be detrimental to the work rate during the match, which can be counteracted by substitute players.
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