As well as the UEFA Europa League's oldest-ever goalscorer, matchday four featured another 5-0 win for Napoli and the first player to register for four clubs in the competition.
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• Napoli (Group D) and Rapid Wien (E) maintained their 100% records on matchday four to clinch qualification for the round of 32 alongside two other clubs – Molde (A) and Borussia Dortmund (C). Only six teams have ever won all six group games in the UEFA Europa League, and in just one previous campaign have two sides achieved the feat – Tottenham Hotspur and Salzburg in 2013/14.
• Napoli's 5-0 win against Midtjylland was their second in succession at home by that scoreline, the Italians having also put five without reply past Club Brugge in the Stadio San Paolo on matchday one. Indeed, the Serie A outfit are the first club ever to have posted two victories by five goals or more in the UEFA Europa League, 11 other teams having done so once.
• With 16 goals scored already in their first four matches, the Neapolitans require five more in their last two games to equal the UEFA Europa League group stage record of 21 set last season by Salzburg.
• Marc Janko's successful penalty in Basel's 2-0 triumph at Belenenses not only took the Austrian international into double figures for the competition; it also enabled him to become the first player to score in the UEFA Europa League for four different clubs. He had previously found the net four times each for Salzburg and Twente and once for Trabzonspor.
• Raúl Bobadilla also claimed a unique distinction by becoming the first player to hit UEFA Europa League hat-tricks for two different clubs, his treble in Augsburg's 4-1 win over AZ Alkmaar coming three years after he struck all three goals in Young Boys' 3-1 victory against Udinese.
• Rui Patrício's red card in Sporting CP's 3-0 defeat at Skënderbeu was the ninth shown to a player from the Lisbon side, which equals the competition record previously held alone by Dynamo Kyiv.
• The Sporting goalkeeper's forthcoming suspension means that he will not now be able to equal Andriy Yarmolenko's UEFA Europa League appearance record for a single club (38 games for Dynamo Kyiv) by the end of the group stage. The match in Elbasan was his 36th in the competition for Sporting.
• Skënderbeu's success halted a run of three straight losses and means that all eight debutants in this season's group stage have now registered at least one win. It was also the first victory by an Albanian club in the group stage of any UEFA competition.
• Celtic's 2-1 home reverse against Molde was their ninth consecutive UEFA Europa League fixture without a win – just three short of the competition record held jointly by Partizan and Slovan Bratislava.
• Molde's clinching goal at Celtic Park was scored by Daniel Hestad, making the Norwegian team's captain the oldest goalscorer in UEFA Europa League history at 40 years and 98 days. He eclipses the record previously held by ex-Viktoria Plzeň skipper Pavel Horváth, who was a mere 37 years and 214 days old when he set his mark against Académica Coimbra in November 2012.