Liverpool secured their 19th Premier League win of the season on Saturday by narrowly beating Crystal Palace 4-2.Victory means the Reds are now seven points clear at the top of the table, though Manchester City have the chance to reduce the gap on Sunday.Despite winning, Jurgen Klopp will have been slightly concerned by his side's performance at Anfield.Palace actually took the lead through Andros Townsend in the 34th minute and, perhaps deservedly, went into the half-time break ahead.Mohamed Salah and Roberto Firmino then made it 2-1 Liverpool within 10 minutes of the second period, but before long Palace were back on level terms.James Tomkins rose highest from Luka Milivojevic's corner in the 65th minute to head past Alisson and silence the crowd.Palace's jubilation was short-lived, though, as Salah put Liverpool back in front with his second of the game and Sadio Mane sealed all three points in stoppage time.Max Meyer's goal in the 95th minute threatened an unlikely comeback but the game ended 4-3 in the hosts' favour.Liverpool are going to need to be much better in the coming weeks if they're going to protect their lead at the top of the Premier League, so it might be wise for Klopp to make some changes.One decision he probably regrets was starting Naby Keita, because the Guinean was dreadful for most of the game.Keita looked rusty and came under a lot of criticism on social media throughout his 71-minute stint, even if he did provide the assist for Firmino's goal.However, more level-headed Liverpool fans have jumped to the 23-year-old's defence by passing the blame onto Klopp, who made the strange decision to start him on the left wing.Keita was signed as a versatile midfielder, but the fact of the matter is he's not a left winger. A ropey performance was always to be expected.Here's what Liverpool fans have been tweeting.

Sorry Jurgen, but Liverpool fans have a point. Keita's strongest position is in the middle of midfield and that's where he should be played, not out wide.