Napoli kept in touch with Serie A leaders Juventus with a 5-1 thumping of bottom club Pescara on Sunday while Inter Milan scraped a 1-0 win over Palermo.
Bayern Munich midfielder Bastian Schweinsteiger will be out for up to six weeks after breaking his collarbone in the 3-2 Champions League win over Napoli on Wednesday, the club said.
Italian side Napoli has moved into second place in their Champions League Group F on Wednesday with a 3-2 win over French side Marseille at Sao Paolo.
Atalanta forward German Denis took advantage of shocking defending by Napoli to score twice in a 3-0 win over Rafael Benitez's exasperatingly inconsistent team on Sunday.
Napoli could become the first team in Champions League history to qualify from their group after only three games on Wednesday, providing welcome relief from their recent troubles.
Brazil playmaker Kaka scored his first goal, a delightful curling shot, since his return to AC Milan at the start of the season but his struggling team were held 1-1 at home by Lazio in Serie A on Wednesday.
Leicester City has a chance to go top of the English Premier League table with a maximum nine points.
Juventus made light work of bitter rivals Inter Milan on Sunday, winning 3-1 to increase their Serie A lead to nine points after AS Roma were washed out and Napoli blundered to a 3-0 defeat at Atalanta.
Napoli kept their hopes of a first Serie A title since 1990 alive with an epic 4-2 win over 10-man Inter Milan after a Carlos Tevez hat-trick had put leaders Juventus six points clear with a 4-0 rout of Sassuolo on Sunday.
Barcelona and Atletico Madrid led a Spanish Armada into the Champions League last 16 with home wins on Wednesday and in-form Aaron Ramsey steadied Arsenal's boat with a battling win against rocky Borussia Dortmund.