Slavisa Jokanovic has warned his players there is no room for arrogance when Watford travel to Championship strugglers Millwall, with Hornets captain Troy Deeney claiming tomorrow’s match will be tougher than Monday’s crucial win over promotion rivals Middlesbrough.

Watford are currently third in the table and only outside the automatic promotion places due to Norwich City’s goal difference being two better off.

Millwall, to the contrary, are 22nd in the Championship and are battling to stay in the division. They are seven points from safety but do have a game in hand on the sides immediately above them.

Speaking immediately after Watford’s 2-0 win over Boro, head coach Jokanovic said: “We have our battle to go up and their battle is no less than ours. We must be prepared and we don’t have room to be arrogant and think the games in front of us will be easy.”

He reiterated that point yesterday, saying: “I expect Millwall will be motivated. They are a very aggressive team and have great team spirit and I believe they will be fighting because they need to win games to stay in the division.

“If we are arrogant in this match we will be in big trouble.”

Lions legend Neil Harris is in temporary charge at The Den after the club sacked Ian Holloway last month, which resulted in Hornets great Nigel Gibbs also leaving the club.

Harris has overseen four matches since being placed in charge. After losing his first to Bolton Wanderers, the Lions have avoided defeat in their last three and beat Charlton Athletic 2-1 on Good Friday.

It was their first victory since February 10 and the first time they had secured three points at home since the end of October.

But Deeney said: “Millwall is going to be a completely different test and an even harder test than Middlesbrough in my opinion. It is going to be ugly; it is at The Den so you are going to get abused and you have to be able to handle all situations and handle the expectation that you are expected to win. It is going to be a good day.”

Watford had an impressive Easter Bank Holiday; after coming from behind with ten men to draw 2-2 at promotion rivals Derby County, they beat then top-of-the-table Middlesbrough 2-0 three days later.

After two good results against fellow promotion chasers, Jokanovic was asked about the risk of complacency when facing a team at the other end of the table.

“I am not working with silly people,” Jokanovic responded. “I have explained to the players what they will find on the field. We can’t sleep and be happy because we won a game against Middlesbrough. We must continue to be a team, play with humility and show no arrogance. We must push altogether.

“I have clever people and they must be ready to answer the situation on Saturday.”

In the last two games against teams who Jokanovic deemed to be physical, versus Wigan Athletic and Rotherham, the Serbian named a defence consisting of all centre backs, with Craig Cathcart at right back and Tommie Hoban on the left.

Jokanovic was asked if he would adopt a similar policy tomorrow, but responded with: “I am not going to tell you anything about my team. I will try, with my staff, to come up with the best plan for this game.

“This is not the moment to relax and I don’t want people to think we will have an advantage. It is a very complicated game for us and we must arrive with a clear mind.

“We must have no arrogance, show humility and solidarity and interpret the game. I expect my team will be ready.”

Deeney has been crucial to the Golden Boys’ automatic promotion push and on Monday made history by becoming the first Hornet to score 20 goals in three consecutive seasons.

Jokanovic, whose side travel to Nottingham Forest on Wednesday, has called on the 26-year-old to replicate that form in the coming month and help guide Watford into the top flight of English football.

Jokanovic said: “He is a Premier League quality striker. I expect he will support us and help us a lot with what is in front of us.

“He will not be happy to go on holiday now and enjoy his great historical triumph. Now is the moment to push harder.

“His teammates and the supporters still believe he can do better. He has had a great three years at Watford, which is clear. I am interested though in these next 20 days,” he added.