On Sunday, Sanchez arrived in Manchester to undergo a medical at Carrington and sign what is expected to be a four-and-a-half-year deal.
Sanchez is reportedly poised to be United's highest-paid player with weekly wages of £400,000 ($550,000), and Whiteside warned that the club's other big-name players could demand pay rises to match the Chilean.
"Wage parity is very important to players".
Sanchez's future has always been a hot topic in the Premier League, with Manchester City almost snatching him from Arsenal for a figure thought to be €70m in August. Yes, they find out - at all levels - and if someone is paid a lot higher than others that can cause a problem.
Wenger said Sanchez was absent from the Arsenal squad on Saturday because he was close to completing a deal that has been in the making since United out-bid Manchester City for the former Barcelona star.
Sen. Paul calls shutdown blame game 'ridiculous'
However, several Senate Republicans said that McConnell was in no mood to give Schumer any assurances to open up the government. At the White House on Sunday, there were few signs of activity, as a skeleton crew of aides remained at work.
Wenger said Chile global Sanchez was absent for their 4-1 win against Crystal Palace yesterday because he was close to completing a deal that has been in the making since United out-bid Manchester City for the former Barcelona star.
Anthony Martial struck in the 54th minute of a contest that saw United struggle for attacking momentum for much of the time, with their hosts doing some solid defensive work as well as going close to scoring themselves.
Sky said it understood it could be a straight swap deal but details were yet to be finalised.
"City have got to win the title from here - but after signing Alexis Sanchez I can also see United winning the Champions League", he told the Sunday Mirror. "It will lift the level of the whole club".