Complex sentence: The humid weather meant that the game was played at a relatively slow pace which seemed to favour Porto, and led to a number of rash challenges from Celtic, one of which led to Joos Valgaeren getting a yellow card on 8 minutes.
Split into simpler sentences: The humid weather meant that the game was played at a relatively slow pace, which seemed to favour Porto. This caused a number of rash challenges from Celtic, one of which led to Joos Valgaeren getting a yellow card on 8 minutes.