Odion Ighalo of Watford shoots past Scott Dann of Crystal Palace during The Emirates FA Cup semi final match between Watford and Crystal Palace at Wembley Stadium on April 24, 2016 in London, England.

Wilfried Zaha of Crystal Palace battles with Allan-Romeo Nyom (L) and Nathan Ake of Watford during The Emirates FA Cup semi final match between Watford and Crystal Palace at Wembley Stadium on April 24, 2016 in London, England.

Connor Wickham of Crystal Palace celebrates after he scores to make it 2-1 during The Emirates FA Cup semi final match between Watford and Crystal Palace at Wembley Stadium on April 24, 2016 in London, England.

Connor Wickham of Crystal Palace celebrates after he scores to make it 2-1 during The Emirates FA Cup semi final match between Watford and Crystal Palace at Wembley Stadium on April 24, 2016 in London, England.

Connor Wickham of Crystal Palace (21) celebrates with Joel Ward as he scores their second goal with a header during The Emirates FA Cup semi final match between Watford and Crystal Palace at Wembley Stadium on April 24, 2016 in London,...More

Connor Wickham of Crystal Palace (21) celebrates as he scores their second goal with a header during The Emirates FA Cup semi final match between Watford and Crystal Palace at Wembley Stadium on April 24, 2016 in London, England.

Crystal Palace's English striker Connor Wickham celebrates scoring their second goal to take the lead 2-1 during an FA Cup semi-final football match between Crystal Palace and Watford at Wembley Stadium in London on April 24, 2016. /...More

Crystal Palace's English striker Connor Wickham (R) celebrates scoring their second goal to take the lead 2-1 during an FA Cup semi-final football match between Crystal Palace and Watford at Wembley Stadium in London on April 24, 2016....More

Connor Wickham of Crystal Palace (C) scores their second goal with a header during The Emirates FA Cup semi final match between Watford and Crystal Palace at Wembley Stadium on April 24, 2016 in London, England.