He's hugely underrated defensively.
All CMs and DMs (Excluding Sub appearances - in other words, just first-teamers) - Played minimum of 8 games:
Tackles per 90 minutes
Allan 3.6
Romeu 3.6
McArthur 3.5
Fred 3.3
Gallagher 3.2
Bissouma 3.1
Kante 3
Neves 3
Moutinho 2.8
Philips 2.7
Interceptions per 90 minutes
Brownhill 3
Kante 2.4
Ceballos 2.3
Neves 2.3
Zambo 2.3
Reed 2.3
Fred 2.1
Rice 1.9
Phillips 1.8
Jorginho 1.7
Combined per 90 minutes
Fred - 5.4
Kante - 5.4
Neves - 5.3
Romeu - 5.1
Allan - 4.6
Phillips - 4.5
It turns out that Fred is actually the joint best midfielder in the league defensively. Yet, people keep calling him a poor tackler. Do you know why he attempts so many tackles? Because he has the second most presses out of any player in the league. Only Allan had more the last time I checked, and he is number one in tackles per 90.
Despite the difference between the top four being marginal, he and Kante are still slightly better than the rest. Fred is very well rounded defensively. He is very much like Kante in this way, except he makes slight more tackles whilst Kante makes slightly more interceptions.