Feyenoord erected high nets behind both goals after fans threw fireworks and cigarette lighters at Sporting Lisbon's goalkeeper during Thursday's UEFA Cup loss.
Defending champion AC Milan ended Inter Milan's 25-match unbeaten streak and possibly its derby rival's title hopes in a 1-0 victory at San Siro stadium.
Brazilian Kaka deflected a drive by teammate Ivan Gattuso off a corner kick in the 74th minute to give AC Milan a prestigious win and first place in the Serie A standings, in a tie with Juventus.
Juventus downed Siena 3-0 at Stadio Delle Alpi to compile 57 points in the table.
In a perfect balance of power, AC Milan equaled Juventus' points, the record of 17-6-3, and the goals differential as well.
Inter's first loss this season after 26 rounds left it 14 points behind the leading duo, in fourth place.
Italian premier and AC Milan owner Silvio Berlusconi was in the stands to support his team which controlled almost with ease Inter's offensive outbursts.
"There was little thrill and less than impressive play," Berlusconi said. "I believe a draw could have been the fair result."
Inter tried hard in the closing minutes to seek an equalizer when Christian Vieri, Obafemi Martins and Adriano were thrown together up front, but AC Milan's defense based on Alessandro Nesta and veterans Paolo Maldini and Alessandro Costacurta, withstood the pressure.
Milan coach Carlo Ancelotti praised his defense, which also impressed in last Wednesday's 1-0 win in the Champions League match at Manchester United.
"It was a balanced match, with defenses of both sides prevailing," Ancelotti said. "Ours was especially good."
Laurent Batlle's goal helped Marseille draw 1-1 at home with last-placed Istres but miss a chance to close the gap on first division leader Lyon.
The point moved Marseille above Lille into second spot with 48 points, but eight points behind Lyon, which was chasing a record-equaling fourth straight title.
Senegalese striker Moussa N'Diaye gave Istres a shock lead in the 48th minute, but Batlles leveled in the 56th.
Lille stumbled to 0-0 against visiting Rennes, the team with the worst away record in the top flight. Coach Claude Puel's side has 47 points.
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