Marcus Rashford and Trent Alexander-Arnold are now acutely aware of just how difficult it's going to be for them to become first-team regulars at Barcelona and Real Madrid, respectively.
In fairness to Rashford, he had a fair idea what he was getting into when he joined the Blaugrana, who possess arguably the best attack in world football. So, the on-loan Manchester United forward knows full well that securing a permanent move to Catalunya hinges upon him making the most of every single opportunity that comes his way. Unfortunately, he failed to do that on Saturday.
Despite starting on the left wing against Levante, Rashford was hauled off at half-time with his team 2-0 down. The Englishman was by no means the only Barca player performing poorly at the time - he actually completed all 40 of his attempted passes and created a couple of chances - but his goal threat was almost non-existent (0.03 xG).
Barca also looked far more like their usual selves after Raphinha was restored to his usual role on the left-hand side following the introduction of attacking midfielder Dani Olmo in place of Rashford. The Blaugrana drew level thanks to second-half strikes from Pedri and Ferran Torres - who has shown why Hansi Flick considers him a better replacement for the injured Robert Lewandowski than Rashford with two goals in two games - before Levante defender Unai Elgezabal put through his own net in injury time.
Alexander-Arnold, meanwhile, was only brought on in the 87th minute of Real Madrid's 3-0 win at Oviedo the following night. The former Liverpool right-back wasn't the only high-profile player benched for the game at the Estadio Carlos Tartiere, as coach Xabi Alonso also left Vinicius Jr out of his starting line-up. However, whereas the Brazilian came on midway through the second half and reminded everyone of his quality with a goal and an assist, Alexander-Arnold touched the ball just once during his time on the field.
The major difference between the two superstar subs, though, is Vinicius' status as a starter remains beyond dispute at Santiago Bernabeu. Alexander-Arnold, on the other hand, still has to prove that he's actually a better option at right-back than the fit-again Davi Carvajal - and it feels like a lot of people overlooked that fact when the England international signed for Madrid.
Indeed, one could easily argue that Alexander-Arnold has an even tougher task than Rashford this season: The latter just needs to show that he can be a useful back-up at Barca; the former has put himself under pressure to perform at a Ballon d'Or-winning level and he's competing for a starting spot with the man that finished fourth in last year's voting!