Porto's Radamel Falcao scored a hat-trick to help the newly-crowned Portuguese champions thrash Spartak Moscow 5-1 as goals flowed and South American players shone in Europa League quarter-final first leg ties on Thursday.
Despite an abundance of individual talent, Argentina have looked anything but impressive during Sampaoli's year in charge and their 1-1 draw against the World Cup debutants, including a missed Lionel Messi penalty, was another frustrating afternoon.
A thrilling draw away to Salzburg enabled Serbian champions Red Star Belgrade to reach the Champions League group stage for the first time where they will be joined by Portugal's Benfica and Dutch side PSV Eindhoven. Red Star, who won the European Cup in 1991, came back from two goals down in an electrifying second leg in Austria to draw 2-2 and go through on away goals.
Thomas Meunier volleyed a spectacular last-minute goal to give Paris St Germain a 2-1 win at FC Basel, which took them into the last 16 of the Champions League on Tuesday.
IMAGES from the FIFA World Cup Group D match played between Argentina and Iceland at Kazan Stadium on Saturday
Images from the UEFA Champions League matches played on Wednesday
France substitute Kylian Mbappe engineered two late goals to rescue a 2-2 draw against Iceland and spare the blushes of the world champions in their friendly.
Barcelona battled back from a goal down and scored twice in the second half to overcome hosts Borussia Moenchengladbach 2-1 in their Champions League Group C match on Wednesday despite the absence of the injured Lionel Messi.
Cristiano Ronaldo renewed his personal battle with Lionel Messi by scoring his 71st Champions League goal, putting him three behind the Argentine's newly-set record, in Real Madrid's 1-0 win at FC Basel on Wednesday.