During the pre-season, Mourinho put detailed reports of the team training on the club website. The reports were filled with formal vocabulary, as, for instance, he referred to a 20 km jog as an extended aerobic exercise. While they attracted some scorn for the pretentiousness, others praised the innovation and the application of a more scientific approach to the training methods practised in Portugal. One of the key aspects in Mourinho-era Porto was his quick wit and the pressuring play, which started at the offensive line, dubbed pressão alta ("high pressure"). The physical and combative abilities of the teams' defenders and midfielders allowed Porto to apply pressure from the offensive lines and forced opponents either to concede the ball or try longer, uncertain passes.
In 2003, Mourinho won his first Primeira Liga with a 27–5–2 record, 11 points clear of Benfica, the team he quit two years earlier. The total of 86 points out of the possible maximum of 102 was a Portuguese record since the rule of three points per win was introduced. Mourinho also won the Taça de Portugal, beating former club Leiria in the final, and the UEFA Cup final against Celtic, both in May 2003