AP Photo/Kirsty WigginsworthAfter Serena Williams and multiple other players have lost their feet in matches, former tennis star Tim Henman dismissed concerns about Wimbledon's playing surface.Henman, who is now a member the All England club board to the BBC, stated that Wimbledon would leave no stone unturned, and he hoped there wouldn't be any more injuries. "The courts are as good today as they were in the past."He said that Wimbledon officials have all the data necessary to determine court surface conditions.Williams is the most famous player to slip on Wimbledon grass. She tried to continue, but she was forced to withdraw from her match against Aliaksandra Ssnovich in the first round.After sliding along the baseline, Adrian Mannarino was forced to retire in the fifth set against Roger Federer.It is not uncommon for a tennis match to end in a fall, particularly on clay and grass because they offer less grip than a hard court. However, many players have voiced their disapproval of the All England Club's surface.Bianca Andreescu stated that she didn't slip once, but six times. The courts are extremely slippery. Although I've only been here once, they were not like this. It's not normal, according to some other players. This is something we cannot control.Federer also expressed similar sentiments.The eight-time champion stated that he felt the roof feels "a little more slippery under the roof." It could be a gut feeling or a real thing. You must be careful out there. You can fall if you push too hard at the wrong times.Murray expressed his dismay for Williams but also mentioned the state of the court via Twitter:Henman stated that maintaining grass is a bit more challenging this year due to the London weather, which has limited the ability of courts to dry.The All England Club stated that the courts would "continue to strengthen" with every match.This is unlikely to be a comfort for Williams or Mannarino.