Kyle Walker has arguably faced more challenges than any other player on the Man City team this season. Throughout most of the season, the defense has appeared weak and disorganized, with Walker being a significant weak link that opponents consistently take advantage of. Since as early as September, during Arsenal’s visit to the Etihad, Walker has been responsible for goals conceded and points lost. He has been a strong presence in championship-winning defenses before, but has age finally taken a toll on him, making it difficult for opponents to keep up? Is it time for Walker to transition out, and is the younger player Rico Lewis prepared to take his place? READ MORE: I noticed Guardiola’s shift before the crisis at Man City against Liverpool FC. READ MORE: All of Pep Guardiola’s comments before the Liverpool vs Man City match. Last Saturday’s defeat by Tottenham Hotspur was the strongest sign so far that Walker’s peak performance days are likely behind him. He didn’t have much to deal with on his side of the field for most of the game, but he has to take full responsibility for Spurs’ fourth goal. A player recognized for his quickness off the ball being outpaced by Timo Werner suggests that Walker might be past his prime. Although some may argue that Werner was on the field for just four minutes compared to Walker’s 94, this isn’t the first instance of Walker’s defensive shortcomings or being outrun this season. He has made significant mistakes that resulted in goals against Arsenal and Watford, and he was also easily outpaced by Adama Traore in the match against Fulham. If Walker is indeed nearing the end of his time at City and the club considers finding a replacement for him at right-back, is the 20-year-old Lewis prepared to take over, or should City explore other options?