The question many ask whenever Momo Sissoko is in the Liverpool team is whether the side is better or worse for his inclusion. He often plays as part of a five man midfield so an additional attacker is sacrificed for more control. Statistically it is difficult to measure the worth of midfielders as clean sheets and goals are not the fairest measure of a working midfielder who wins the ball and distributes it to team mates.
The comparison below looks at Liverpool results with and without Sissoko, the number of goals scored and conceded with and without him plus his achilles heel of fouls in terms of yellow cards. Xabi Alonso has been included for comparison.
2005/6-2006/7
Liverpool with Sissoko - P71 W46 D10 L15 F110 A57 (win 64.8%)
Liverpool without Sissoko - P43 W26 D9 L8 F79 A31 (win 60.5%)
Liverpool win more games with Sissoko than without.
2004/5-2006/7
Liverpool with Alonso - P130 W78 D23 L29 F214 A108 (win 60.0%)
Liverpool without Alonso - P44 W25 D6 L13 F57 A36 (win 56.8%)
Liverpool win more with Sissoko in the side compared to when Alonso plays, however Liverpool win less games without Alonso than they do without Sissoko. And the record for Alonso covers three years, the first of which was not the best so Alonso is disadvantaged there.
But does Sissoko have an impact on the game in terms of goals, as a predominantly defensive player you would expect Liverpool to concede less with Sissoko in the team although, with a more defensive outlook, this can affect goals scored as well.
Goals For
With Sissoko - 110 goals in 71 games (1.55 goals/game)
Without Sissoko - 79 goals in 43 games (1.84 goals/game)
Compared to Xabi Alonso
With Alonso - 214 goals in 130 games (1.65 goals/game)
Without Alonso - 57 goals in 44 games (1.30 goals/game)
More goals per game scored with Xabi Alonso in the side and less goals per game without him in the side. Goalscoring has been the weak link in Rafa's reign, supply and distribution is a key element in creating chances and few would prefer Sissoko to be making the passes instead of Alonso. Whether there is room for them both is another matter, obviously some of the games both will have played.
Goals Against
With Sissoko - 57 goals in 71 games (0.80 goals/game)
Without Sissoko - 31 goals in 43 games (0.72 goals/game)
Compared to Xabi Alonso
With Alonso - 108 goals in 130 games (0.83 goals/game)
Without Alonso - 36 goals in 44 games (0.82 goals/game)
The team concedes less goals per game when Sissoko is not in the team, although this may be in part down to the quality of opposition and Liverpool fielding a more attacking line-up. Alonso's inclusion appears to have minimal effect on the defensive records.
Of course it isn't just average number of goals that matter, if a team can keep a clean sheet then a single goal will win the game and you're guaranteed at least a draw.
Clean Sheets
With Sissoko - 33 clean sheets in 71 games (46.48%)
Without Sissoko - 27 clean sheets in 43 games (62.79%)
So without Sissoko Liverpool score more goals per game and concede less goals per game registering a considerably greater percentage of clean sheets. This will in part be down to the opposition played, especially if Rafael Benitez feels the extra midfielder in the holding role is not needed because Liverpool are at home and the opposition less attack minded or if the opponents are someone we would be looking to beat home or away. Rafa may bring in Sissoko to try and control midfield against tougher opponents, whether this actually works is debatable. In 28 matches against Man Utd, Chelsea and Arsenal under Rafa, Liverpool have failed to score on 13 occaisions (46.4% of the time) and only kept 8 clean sheets - 4 of those against Chelsea in the Champions League.
Passing and scoring are two of Sissoko's weaker suits, something he has to improve on or his time at Anfield may soon come to an end. Xabi Alonso has a much better range of passes, scores the odd goal and the clean sheet record with and without him suggests Liverpool need him more than Sissoko.
Clean Sheets
With Alonso - 62 clean sheets in 130 games (47.69%)
Without Alonso - 16 clean sheets in 44 games (36.36%)