It's hard to watch the severe struggle Andy Murray has to endure on these days. Shifting from clay to the grass court should have been the key moment of this season as the gap between him and the rest of the herd got thinner. Yesterday, Andy Murray lost his opening match at Queen's Championships, an ATP 500 event where he was the defending champion.

He was not the only one being subject to a major upset as the next two seeds Stan Wawrinka and Milos Raonic were also eliminated in what was a shocking day for high-profile names. After reaching the semis at the French Open, the trend seemed to have found a way to go up for Murray.

Today's performance was an unexpected episode, and it might indicate the sign of a deeper problem or just an unfortunate event.

The lucky loser who went on scoring the biggest win of his career

Initially, Andy Murray was scheduled to face Aljaz Bedene (54 ATP) a fellow compatriot. Following Bedene's withdrawal, the vacant slot was handed to Jordan Thompson (90 ATP) who simply decided to make the match of his life. Having the opportunity to face the world no. 1 the 23-year-old Aussie did everything by the book while on the other side of the net Murray seemed to be rather off than willing to compete.

The balance was the guiding word of the opening which went to a tie-break. Winning the opening act gave Thompson a solid ground to step into the second one.

In the end, it was 7-6 6-6 for the young Aussie while for Murray was just another day spent out in the rain without an umbrella at his disposal.

It's been few harsh months for Andy Murray who had only one glimpse when won the title in Dubai. Now that he came short during the warm-up season prior to Wimbledon, the roots of disbelief or lack of confidence could hew in deeper into his core.

What causes the decline

What's happening to Andy Murray right now, it's just the natural course of things. A professional Tennis player will have a moment of the peak followed by a downward spiral. The only difference is being made by the time between the peak of form and when the decline starts. In Murray's case, the gap was quite short.

For a proper comparison just look at Federer's history or Nadal or most recently at Novak Djokovic's case.

Once they got to the top, they were in an irremovable state for a long period of time, even years. Reaching his peak around 30 might be the cause of a faster decline. Those other three made it to the top while in their prime. With Rafael Nadal racing from behind, it's likely that Murray will lose the world no. 1 seat by the end of the year. But, he is still one of best ATP player and definitely has resources to keep on being relevant at the top of the ATP circuit.