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The purpose of this study was to examine the changes in technical and physical performance between the first and second half during official matches of Italian Serie A league. Further aim was to compare the technical and physical performance of the players of the more successful teams (ranked in the first 5 positions) with the players of the less successful teams (ranked in the last 5 positions) from the same league. A total of 416 individual games from 186 soccer players (27±4 years, 76±5kg, and 181±5cm) were analysed using a video match-analysis system. The match performance parameters analysed were: total distance covered (TD), high-intensity running distance (HIR), very high-intensity running distance (VHIR), total distance with the ball (TDB), high-intensity running distance with the ball (HIRB), and very high-intensity running distance with the ball (VHIRB). The number of skill involvements was also …