Leeds United have been linked with the young winger.
The Everton captain believes Koeman is the right man to lead a recovery after a poor couple of years.
With plenty of players away because of international tournaments over the summer, one or two have a real chance to stake their claim.
Celtic signed Moussa Dembele from Fulham last week.
Mark Warburton has signed eight players for Ibrox side Glasgow Rangers this summer.
Queens Park Rangers and Swansea City have agreed a fee for Leroy Fer.
Celtic are unbeaten in Brendan Rodgers first two friendlies in charge.
Reina would become one of Liverpool's most popular players in recent years.
The midfielder was in impressive form for France in the win over Iceland.
West Ham United have started pre-season training ahead of the 2016-17 campaign.
Whenever Iceland can tear themselves away from the spectacular view over Lake Annecy from their hotel, Les Trésoms, there is a convenient photograph to train their minds on the job in hand.
Casual isn’t necessarily cheap. To ease the transition to a recent move to business-casual attire, J.P. Morgan partnered with one of its clients to host a pop-up shop at its Park Avenue headquarters: Vineyard Vines.