Watford will take on SK Austria Klagenfurt and SV Feldkirchen during their two-week pre-season stay in Austria.
The Hornets players returned to training on Monday and are currently in Udine, the city in northern Italy where Udinese are based.
However, they will spend a fortnight in Austria and will take on Austian third division side Austria Klagenfurt in Klagenfurt on Saturday, July 5. A kick off time has yet to be confirmed by the club.
Three days later the Hornets are back in action and they will face another third division team, SV Feldkirchen.
The game will be held at the Feldkirchen Stadium on Tuesday, July 8 with a 6pm kick off.
On Saturday, July 12 the Hornets play Russian club and participants in last season's Europa League Rubin Kazan, with kick-off 6pm, and the next day they face German third division side FC Chemnitzer at 5pm. Both fixtures will take place in Bad Bleiberg.