Here, using stats guru Ben Mayhew's research, we took a look at the time the Pompey have spent winning, losing and drawing in League One this season and how it compared to their divisional rivals after 11 games played.
The stats show Portsmouth could do well to look at another manager if poor results continue.
Scroll down and click through the pages to see how the percentage of time Jackett’s side spent winning, losing and drawing in League One this season.
1. Tranmere Rovers (23rd)
Percentage of time spent... Winning: 5.8% Drawing: 44.1% Losing: 50.1% | Getty Images Photo: Lewis Storey
2. Southend United (22nd)
Percentage of time spent... Winning: 18.3% Drawing: 32.9% Losing: 48.8% | Getty Images Photo: Naomi Baker
3. Bolton Wanderers (21st)
Percentage of time spent... Winning: 5.4% Drawing: 58.9% Losing: 35.7% | Getty Images Photo: Nathan Stirk
4. MK Dons (20th)
Percentage of time spent... Winning: 27.9% Drawing: 27.2% Losing: 45.1% | Getty Images Photo: Pete Norton