Ryan Nelsen believes West Ham have issued a statement of intent by tying Winston Reid to a new deal.
Tottenham are keen for striker Shaquile Coulthirst to continue his development out on loan after his spell at Southend.
A United scouting delegation was reported to have been in Zenica on Friday, where they watched Begovic helped Bosnia to a 3-1 win over Greece.
"I'm not under more pressure because United is watching me, I'm glad that they do because that mean I'm doing something good. It gives me more motivation to do better and better," he told Sport.ba.
"I'm glad that they do because that means I'm doing something good. It gives me more motivation to do better and better.
"I'm pleased that the big clubs are interested in me, but as I said many times - I'm happy at Stoke City because they gave me a chance to play in Premier League.
"We will see what will happen in the summer. In football you can never know what will happen."