Bruno Guimaraes continues to prove his worth as a substitute for Arsenal, netting a crucial late winner to secure a 2-1 comeback victory over Leeds United at Emirates Stadium on Saturday. However, the win was overshadowed by fresh injury concerns after Piero Hincapie was helped off the pitch following the final whistle.
The Brazilian midfielder, signed for £75m in the summer, has now become something of a talisman off the bench for Mikel Arteta's side. He previously sparked a 2-0 win at Sunderland in September with an opening goal, and he repeated the trick against Daniel Farke's Leeds side, scoring the decisive goal after coming on as a substitute during his full home debut.
Arsenal had fallen behind in the 55th minute, marking the third time in four league matches they have found themselves trailing. Riccardo Calafiori leveled matters with his first league goal of the campaign before Guimaraes struck to complete the turnaround. The result moved Arsenal level on points with Premier League leaders Manchester City, continuing their push for back-to-back titles despite a performance that fell short of their usual standards for long periods.
Speaking after the match, Arteta praised the impact of his midfielder following a disappointing display in the previous match, a 3-0 defeat at Brighton. "He wasn't at that level against Brighton, and this is the level for Arsenal. Every week, every game, every minute, every action, you have to be at that level," Arteta said. "Today was much better. That's what we have to demand, and this is what I demand to myself. I'm going to demand the same with the players, because if we do that, he will raise the standards and we will be a better team."
The Arsenal manager also reflected on the dip in intensity his side showed at Brighton, drawing a stark contrast with the performance levels required to defend a title. "The last time we put our shirts on, something was missing," Arteta said. "And we need to be very conscious of that. From being exceptional and being the champions to being extremely average, like in that game, is a really thin line. So if you don't want it more than the opponent, you are not able to cope emotionally with certain situations, you're going to suffer. And we all suffered and we didn't enjoy that game, but then you have to learn the lesson and we certainly done that. We speak about it and you could sense that there was something in those tummies."
The post-match mood, though, was tempered by concern over Hincapie, who appeared to injure his ankle during a warm-down session after the match - a routine practice for substitutes and unused players. The Ecuadorian defender needed assistance from third-choice goalkeeper Illan Meslier to leave the pitch. The severity of the issue remains unclear, with the club set to assess him over the next 48 hours ahead of Tuesday's Champions League clash with Lille at home.
Hincapie, who completed a permanent move to Arsenal this summer after an initial loan spell from Bayer Leverkusen, has endured a stop-start campaign already, having missed Ecuador duty during the international break because of a muscular issue. He has made only a handful of appearances this season, starting just once - in the Champions League win over Napoli - with Saturday's outing his third substitute appearance in the league.
His potential absence would add to an already stretched Arsenal defense. Winger Christos Tzolis remains sidelined with a hamstring injury sustained on international duty with Greece, while Cristhian Mosquera is nursing a similar issue from August. William Saliba also continues his recovery from a long-standing back problem, though Kai Havertz and Ezri Konsa both returned from fitness issues in time to feature against Leeds.
Despite the mounting fitness concerns, Arsenal's resilience in grinding out results while below their best has been a feature of their start to the season. Whether that pattern reflects championship-level nous or a deeper cause for concern will likely become clearer as fixtures pile up in the coming weeks.
Based on reporting from BBC Sport and Standard Sport.