It hasn't taken long for Messi in FIFA 23 to get the highest overall rating, with the RTTK (Road to the Knockout) promo bringing a special version of his card. The Argentine magician now jumps ahead of the flock thanks to a stunning player item that could improve even further in the days to come.Though Messi's card might stand out, there are some interesting choices in the latest FIFA 23 promo. Making these cards even more attractive is that some can get upgrades based on real-life results. Let's see who joins the PSG and Argentina star below.Who's joining Messi's highest-rated RTTK card in FIFA 23With a 92 overall, there's no doubt the demand for Messi's RTTK card will be high in FIFA 23. While few can afford him at the moment, there are some nice alternatives they are able to obtain.Helmar Designs 🌷@HelmarDesigns The Round to the Knockouts Squad is out! RTTK Cards upgrade if: Their team qualifies for the Knockouts. Their team wins 2 of the remaining Group Stage games.#RTTK | #FIFA2334🆕 The Round to the Knockouts Squad is out! ✅ℹ️ RTTK Cards upgrade if:1️⃣ Their team qualifies for the Knockouts.2️⃣ Their team wins 2 of the remaining Group Stage games.#RTTK | #FIFA23 https://t.co/PZe569kz7yComplete list of FIFA 23 RTTK cardsMoses Simon LM 82Jonathan ikone RW 83Zambo Anguissa CDM 84Martin Terrier RW 85Ibrahima Konate CB 85Martin Odegaard CAM 86Thomas Lemar CM 86Rafinha RW 86Niklas Sule CB 87Gerrard Moreno ST 87Federico Valverde CM 87Phil Foden CM 88Thomas Muller CAM 88Pierre Emerick Aubameyang ST 89Lionel Messi RW 92Unlike the OTW promo, the RTTK one has fewer options to choose from but offers better cards. EA Sports has also included the Europa League and the Conference as special cards from the two tournaments.Messi could be a good candidate for possible boosts, given PSG are favorites expected to reach the knockouts. The Road to the Knockouts cards will have two conditions through which they can get enhanced in FIFA 23. Footballers will have to win two out of their remaining three fixtures to get one round of upgrades.Another round could be received if their clubs make it to the knockout stages of the relevant tournaments. Given the base stats on some of the cards, any potential boost will be an added advantage as far as the gameplay is concerned. Based on EA Sports' official tracker, more cards will likely arrive as SBCs and mini-releases.The RTTK promo offers cards for footballers currently playing in the three tiers of European competitions. Players can try to obtain these cards from their packs, but the odds will be quite low. Alternatively, gamers can try their hand at the objectives and SBCs, which also feature special cards from the promo.