Strong offensive lines

On Thursday night Chelsea played a draw 1-1 with Eintracht in Germany in the Europa League semi-finals, first leg. Their opponent opened the scoreline at the 23rd minute, but they managed to equalize just a few seconds before the end of the halftime. That was also the final result. A win in the second leg, regardless of the score, and they will qualify for the Europa League final game that is taking place in Baku. In the Premier league, they drew 1-1 with Manchester United, completing three rounds without a win. However, they are still in the top-four places of the table, fighting for their participation in the next season's Champions League.

When Watford suffered a 2-1 loss to Wolves in the previous week, they lost any hope for a Europa League place. After this outcome, they have nothingto fight for in the remaining League games, so they will perform without stress in the final two rounds as they will play just for a better place on the table. If they want to perform in next year's European tournaments, they have to win over Manchester City in the FA Cup final. 

A win will secure a top-four place for Chelsea, but their focus is also on their next week's European game. Their defense isn't trustworthy and Watford, who have a strong offensive line, can take advantage of it. BTTS is my call.