League leaders prolonged their outstanding victory sequence with a commanding three-one result against a player-down their opponents.
The Coventry manager's squad got off to a perfect beginning with their striker and Jamie Allen finding the back of the net within the opening minutes.
Another Coventry attacker contributed a three-goal advantage just before the break, while James Abankwah was sent off before the break.
Imran Louza netted a penalty for the losing team, but it turned out to be nothing more than a consolation strike.
Coventry's goalkeeper Carl Rushworth had before saved a golden chance for Watford, which could have changed the contest early on.
Frank Lampard commented: “This was a tough game this afternoon because the opposition are a good team.”
Jack Clarke came off the sideline to fire the only goal in a one-nil success over the visitors.
Ipswich commanded the game but only found the tie near the end thanks to Clarke's 5th goal of the season.
Ryan Mason's side thought they had netted in added time, but the effort was disallowed for a foul in the penalty area.
A Portsmouth defender turned a late own strike to present the visitors a one-zero win.
The home side have at present secured just one game since the conclusion of August.
Robins said: “It was one of the crucial victories we’ve secured this season.”
Certified Scrum Master with over 10 years of experience in leading Agile transformations and coaching teams to success.