Complex sentence: Senegal finished Group A in second position and thus qualified for the round of 16, where it beat Sweden 2-1 after extra time, becoming the first African side to reach the quarterfinals since Cameroon in 1990.
Split into simpler sentences: Senegal finished Group A in second position and thus qualified for the round of 16. It thus became the first African side to reach the quarterfinals since Cameroon in 1990.