Arsenal star Bukayo Saka had to withdraw from the Gunners' game with Nottingham Forest after an apparent knee injury in a clash with Renan Lodi.<br /><br />With the World Cup just three weeks away, Saka's injury will be a worry for Gareth Southgate with the forward a key member of his squad going to Qatar. <br /><br />The incident occurred just 15 minutes into the game at The Emirates that Arsenal won 5-0, as Lodi seemed to catch the 21-year-old on the ankle, before he fell awkwardly to the floor on his right knee. <br /><br />Saka seemed to be in some discomfort and tried to continue playing, but was eventually forced off with the injury in the 27th minute and replaced by Reiss Nelson. <br /><br /><br />The England man left the pitch and went straight down the tunnel, with both Arsenal boss Mikel Arteta and Southgate both hoping the injury isn't a serious one for Saka. <br /><br />'Hopefully not,' Arteta replied when asked if Saka was a World Cup doubt after the match.<br /><br />'It was a bad kick. Right from the beginning he was limping, but I don't see any further than that. Let's see how he is in the next couple of days.<br /><br />'He got kicked a few times and he wasn't comfortable.'<br /><br />The Arsenal No 7 had already had a significant impact on the match before exiting through injury, Crossing the ball into the box for Gabriel Martinelli to head in the opener inside five minutes. <br /><br />Nelson then added two strikes just after the break, with Thomas Partey and Martin Odegaard also netting in a 5-0 victory.<br /><br />England will already be without Reece James for the tournament next month, whilst there are still injury concerns with Kyle Walker, too. <br /><br />Arsenal meanwhile will not want to lose one of their key players for a prolonged period of time after enjoying such a successful start to the season. <br /><br />The win against Nottingham Forest saw the Gunners return to the top of the Premier League table, two points ahead of champions Manchester City.