Everton possess their own attacking threats that would cause the majority of the Premier League if not Europe's defences problems, but the ease in which they were able to put four goals past Kasper Schmeichel will have alarmed Shakespeare so close to the club's biggest ever match. Or you can follow all the action on The Independent's live blog above.
They face Leicester, who are continuing their resurgence under Craig Shakespeare and can even move into the top half of the Premier League table with a win. Find out by following our live matchcast.
Thirty seconds in and Everton were ahead through Davies, who owed a debt of gratitude to referee Robert Madley.
What is the latest Leicester team news? Nampalys Mendy is still struggling with an ankle injury while Molla Wague had dislocated his shoulder on debut in February, and is still out.
That game is now more important than a trip to Goodison Park and considering how exhausted a number of key players looked against Sunderland last Tuesday Craig Shakespeare is likely to make a fair few changes. Leicester will just want to head into the second leg with a fighting chance, so they'd gladly take a 1-0 or 2-1 loss in the first leg.
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13 of the previous 21 Premier League contests between these two sides have ended level, the greatest draw ratio for a Premier League fixture played over 20 times (62%). Vardy has scored in each of his last three Leicester City games and will need to continue that run if he is to outshine the league's top scorer Romelu Lukaku. They haven't won seven in a row since April 2014. The Belgian striker has hit 10 goals in his last six league games at Goodison Park.
The first-half header was one of five strikes between the two teams before the break and then Lukaku pounced in the area at a set piece to bring his tally up to 23 for the season.
Everton boss Ronald Koeman made two changes to the team that started against Manchester United last time out, with fit-again Morgan Schneiderlin replacing Gareth Barry, and Matthew Pennington coming in for Ashley Williams, who was suspended following his sending-off at Old Trafford on Tuesday night. Atletico were Champions League finalists last season, and they now sit in third place in La Liga while Leicester is 11th in the Premier League.
Craig Shakespeare could equal the Premier League record for winning his first six games in charge, held by Pep Guardiola and Carlo Ancelotti.
However, they are just three points behind Arsenal in fifth so a Europa League spot is not out of the question, although they could really do with getting three points against the Foxes on Sunday.
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